91224158 has 16 divisors (see below), whose sum is σ = 140998416. Its totient is φ = 44245440.

The previous prime is 91224157. The next prime is 91224179. The reversal of 91224158 is 85142219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91224151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3785 + ... + 14027.

It is an arithmetic number, because the mean of its divisors is an integer number (8812401).

Almost surely, 2^91224158 is an apocalyptic number.

91224158 is a deficient number, since it is larger than the sum of its proper divisors (49774258).

91224158 is a wasteful number, since it uses less digits than its factorization.

91224158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10379.

The product of its digits is 5760, while the sum is 32.

The square root of 91224158 is about 9551.1338593907. The cubic root of 91224158 is about 450.1631638771.

The spelling of 91224158 in words is "ninety-one million, two hundred twenty-four thousand, one hundred fifty-eight".