91211132 has 6 divisors (see below), whose sum is σ = 159619488. Its totient is φ = 45605564.

The previous prime is 91211129. The next prime is 91211167. The reversal of 91211132 is 23111219.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11401388 + ... + 11401395.

It is an arithmetic number, because the mean of its divisors is an integer number (26603248).

Almost surely, 2^91211132 is an apocalyptic number.

It is an amenable number.

91211132 is a deficient number, since it is larger than the sum of its proper divisors (68408356).

91211132 is a wasteful number, since it uses less digits than its factorization.

91211132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22802787 (or 22802785 counting only the distinct ones).

The product of its digits is 108, while the sum is 20.

The square root of 91211132 is about 9550.4519264797. The cubic root of 91211132 is about 450.1417364226.

The spelling of 91211132 in words is "ninety-one million, two hundred eleven thousand, one hundred thirty-two".