91222132 has 12 divisors (see below), whose sum is σ = 159791940. Its totient is φ = 45567296.

The previous prime is 91222111. The next prime is 91222147. The reversal of 91222132 is 23122219.

It can be written as a sum of positive squares in 2 ways, for example, as 55294096 + 35928036 = 7436^2 + 5994^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6007 + ... + 14782.

It is an arithmetic number, because the mean of its divisors is an integer number (13315995).

Almost surely, 2^91222132 is an apocalyptic number.

It is an amenable number.

91222132 is a deficient number, since it is larger than the sum of its proper divisors (68569808).

91222132 is a wasteful number, since it uses less digits than its factorization.

91222132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21890 (or 21888 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 91222132 is about 9551.0277980959. The cubic root of 91222132 is about 450.1598312901.

The spelling of 91222132 in words is "ninety-one million, two hundred twenty-two thousand, one hundred thirty-two".