91224371 has 16 divisors (see below), whose sum is σ = 111327744. Its totient is φ = 73047744.

The previous prime is 91224361. The next prime is 91224383. The reversal of 91224371 is 17342219.

It is not a de Polignac number, because 91224371 - 2²² = 87030067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91224361) 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, 335 + ... + 13511.

It is an arithmetic number, because the mean of its divisors is an integer number (6957984).

Almost surely, 2^91224371 is an apocalyptic number.

91224371 is a deficient number, since it is larger than the sum of its proper divisors (20103373).

91224371 is a wasteful number, since it uses less digits than its factorization.

91224371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13250.

The product of its digits is 3024, while the sum is 29.

The square root of 91224371 is about 9551.1450098928. The cubic root of 91224371 is about 450.1635142400.

The spelling of 91224371 in words is "ninety-one million, two hundred twenty-four thousand, three hundred seventy-one".