90505525 has 12 divisors (see below), whose sum is σ = 122429664. Its totient is φ = 65822000.

The previous prime is 90505511. The next prime is 90505537. The reversal of 90505525 is 52550509.

It is not a de Polignac number, because 90505525 - 2²⁵ = 56951093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164281 + ... + 164830.

It is an arithmetic number, because the mean of its divisors is an integer number (10202472).

Almost surely, 2^90505525 is an apocalyptic number.

It is an amenable number.

90505525 is a deficient number, since it is larger than the sum of its proper divisors (31924139).

90505525 is a wasteful number, since it uses less digits than its factorization.

90505525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329132 (or 329127 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 31.

The square root of 90505525 is about 9513.4391783413. The cubic root of 90505525 is about 448.9779686050.

The spelling of 90505525 in words is "ninety million, five hundred five thousand, five hundred twenty-five".