91132212 has 24 divisors (see below), whose sum is σ = 213760512. Its totient is φ = 30217600.

The previous prime is 91132193. The next prime is 91132229. The reversal of 91132212 is 21223119.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17589 + ... + 22172.

It is an arithmetic number, because the mean of its divisors is an integer number (8906688).

Almost surely, 2^91132212 is an apocalyptic number.

It is an amenable number.

91132212 is an abundant number, since it is smaller than the sum of its proper divisors (122628300).

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

91132212 is a wasteful number, since it uses less digits than its factorization.

91132212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39959 (or 39957 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

The square root of 91132212 is about 9546.3192907005. The cubic root of 91132212 is about 450.0118712918.

It can be divided in two parts, 9113 and 2212, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 91132212 in words is "ninety-one million, one hundred thirty-two thousand, two hundred twelve".