91516525 has 24 divisors (see below), whose sum is σ = 120695400. Its totient is φ = 68597760.

The previous prime is 91516511. The next prime is 91516541. The reversal of 91516525 is 52561519.

It can be written as a sum of positive squares in 12 ways, for example, as 26842761 + 64673764 = 5181^2 + 8042^2 .

It is not a de Polignac number, because 91516525 - 2⁹ = 91516013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148017 + ... + 148633.

It is an arithmetic number, because the mean of its divisors is an integer number (5028975).

Almost surely, 2^91516525 is an apocalyptic number.

It is an amenable number.

91516525 is a deficient number, since it is larger than the sum of its proper divisors (29178875).

91516525 is a wasteful number, since it uses less digits than its factorization.

91516525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993 (or 988 counting only the distinct ones).

The product of its digits is 13500, while the sum is 34.

The square root of 91516525 is about 9566.4269714455. The cubic root of 91516525 is about 450.6435647677.

The spelling of 91516525 in words is "ninety-one million, five hundred sixteen thousand, five hundred twenty-five".