90215265 has 32 divisors (see below), whose sum is σ = 165473280. Its totient is φ = 41114304.

The previous prime is 90215261. The next prime is 90215291. The reversal of 90215265 is 56251209.

It is a happy number.

It is not a de Polignac number, because 90215265 - 2² = 90215261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90215261) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 38662 + ... + 40928.

It is an arithmetic number, because the mean of its divisors is an integer number (5171040).

Almost surely, 2^90215265 is an apocalyptic number.

It is an amenable number.

90215265 is a deficient number, since it is larger than the sum of its proper divisors (75258015).

90215265 is a wasteful number, since it uses less digits than its factorization.

90215265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 90215265 is about 9498.1716661682. The cubic root of 90215265 is about 448.4974826141.

The spelling of 90215265 in words is "ninety million, two hundred fifteen thousand, two hundred sixty-five".