99521025 has 12 divisors (see below), whose sum is σ = 164541552. Its totient is φ = 53077840.

The previous prime is 99521017. The next prime is 99521039. The reversal of 99521025 is 52012599.

It is not a de Polignac number, because 99521025 - 2³ = 99521017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 663399 + ... + 663548.

It is an arithmetic number, because the mean of its divisors is an integer number (13711796).

Almost surely, 2^99521025 is an apocalyptic number.

It is an amenable number.

99521025 is a deficient number, since it is larger than the sum of its proper divisors (65020527).

99521025 is a wasteful number, since it uses less digits than its factorization.

99521025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326960 (or 1326955 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 99521025 is about 9976.0225039842. The cubic root of 99521025 is about 463.4166286882.

The spelling of 99521025 in words is "ninety-nine million, five hundred twenty-one thousand, twenty-five".