91500525 has 36 divisors (see below), whose sum is σ = 167001588. Its totient is φ = 47873280.

The previous prime is 91500473. The next prime is 91500527. The reversal of 91500525 is 52500519.

91500525 is a `hidden beast` number, since 91 + 50 + 0 + 525 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 145161 + 91355364 = 381^2 + 9558^2 .

It is not a de Polignac number, because 91500525 - 2¹² = 91496429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91500527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8089 + ... + 15761.

It is an arithmetic number, because the mean of its divisors is an integer number (4638933).

Almost surely, 2^91500525 is an apocalyptic number.

It is an amenable number.

91500525 is a deficient number, since it is larger than the sum of its proper divisors (75501063).

91500525 is a wasteful number, since it uses less digits than its factorization.

91500525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7742 (or 7734 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 91500525 is about 9565.5906770047. The cubic root of 91500525 is about 450.6173009599.

The spelling of 91500525 in words is "ninety-one million, five hundred thousand, five hundred twenty-five".