91022631 has 16 divisors (see below), whose sum is σ = 139075584. Its totient is φ = 51872544.

The previous prime is 91022629. The next prime is 91022647. The reversal of 91022631 is 13622019.

It is not a de Polignac number, because 91022631 - 2¹ = 91022629 is a prime.

It is a super-2 number, since 2×91022631² = 16570238708324322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91022651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2385 + ... + 13701.

It is an arithmetic number, because the mean of its divisors is an integer number (8692224).

Almost surely, 2^91022631 is an apocalyptic number.

91022631 is a deficient number, since it is larger than the sum of its proper divisors (48052953).

91022631 is a wasteful number, since it uses less digits than its factorization.

91022631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11710.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 91022631 is about 9540.5781271367. The cubic root of 91022631 is about 449.8314282183.

The spelling of 91022631 in words is "ninety-one million, twenty-two thousand, six hundred thirty-one".