87117525 has 60 divisors (see below), whose sum is σ = 176086944. Its totient is φ = 42228000.

The previous prime is 87117517. The next prime is 87117529. The reversal of 87117525 is 52571178.

It is not a de Polignac number, because 87117525 - 2³ = 87117517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87117525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87117529) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 20320 + ... + 24230.

Almost surely, 2^87117525 is an apocalyptic number.

It is an amenable number.

87117525 is an abundant number, since it is smaller than the sum of its proper divisors (88969419).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87117525 is a wasteful number, since it uses less digits than its factorization.

87117525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944 (or 3930 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 87117525 is about 9333.6769281993. The cubic root of 87117525 is about 443.3041968653.

The spelling of 87117525 in words is "eighty-seven million, one hundred seventeen thousand, five hundred twenty-five".