90211165 has 16 divisors (see below), whose sum is σ = 119206080. Its totient is φ = 64990720.

The previous prime is 90211159. The next prime is 90211171. The reversal of 90211165 is 56111209.

It is an interprime number because it is at equal distance from previous prime (90211159) and next prime (90211171).

It is not a de Polignac number, because 90211165 - 2¹¹ = 90209117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1780 + ... + 13549.

It is an arithmetic number, because the mean of its divisors is an integer number (7450380).

Almost surely, 2^90211165 is an apocalyptic number.

It is an amenable number.

90211165 is a deficient number, since it is larger than the sum of its proper divisors (28994915).

90211165 is a wasteful number, since it uses less digits than its factorization.

90211165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15452.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 90211165 is about 9497.9558327042. The cubic root of 90211165 is about 448.4906882446.

The spelling of 90211165 in words is "ninety million, two hundred eleven thousand, one hundred sixty-five".