27515 is a member of OEIS A274182: semiprimes that are the sum of the first n odd primes for some n (here 105). The sequence can be generated in the following way:

INPUT

number=27515

L=[]

count,total=0,0

for p in prime_range(3,40000):

  count+=1

  total+=p

  if len(prime_factors(total))==2 and len(divisors(total))==4:

    if total==number:

      print(number,"is the sum of the first",count,"odd primes")

    L.append(total)

print(L)

OUTPUT

27515 is the sum of the first 105 odd primes

[15, 26, 39, 158, 326, 566, 789, 1159, 1262, 1478, 1591, 1718, 2582, 3085, 3829, 4659, 5587, 7697, 8891, 10189, 13885, 14695, 16838, 17281, 18187, 19111, 20057, 22546, 24131, 25798, 26938, 27515, 28102, 35566, 36886, 38919]

27515 is a cyclic and Duffinian number.

27515 can be rendered as a digit equation as follows:

2 + 7 - 5 = -1 + 5