90221625 has 96 divisors (see below), whose sum is σ = 181708800. Its totient is φ = 42768000.

The previous prime is 90221609. The next prime is 90221653. The reversal of 90221625 is 52612209.

It is not a de Polignac number, because 90221625 - 2⁴ = 90221609 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 453276 + ... + 453474.

It is an arithmetic number, because the mean of its divisors is an integer number (1892800).

Almost surely, 2^90221625 is an apocalyptic number.

It is an amenable number.

90221625 is an abundant number, since it is smaller than the sum of its proper divisors (91487175).

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

90221625 is a wasteful number, since it uses less digits than its factorization.

90221625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 90221625 is about 9498.5064615444. The cubic root of 90221625 is about 448.5080217653.

The spelling of 90221625 in words is "ninety million, two hundred twenty-one thousand, six hundred twenty-five".