91131293022 has 48 divisors (see below), whose sum is σ = 228957972096. Its totient is φ = 23670464400.

The previous prime is 91131292997. The next prime is 91131293041. The reversal of 91131293022 is 22039213119.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8961004 + ... + 8971167.

It is an arithmetic number, because the mean of its divisors is an integer number (4769957752).

Almost surely, 2^91131293022 is an apocalyptic number.

91131293022 is an abundant number, since it is smaller than the sum of its proper divisors (137826679074).

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

91131293022 is a wasteful number, since it uses less digits than its factorization.

91131293022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17932205 (or 17932194 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The spelling of 91131293022 in words is "ninety-one billion, one hundred thirty-one million, two hundred ninety-three thousand, twenty-two".