91553216 has 28 divisors (see below), whose sum is σ = 182060088. Its totient is φ = 45679872.

The previous prime is 91553213. The next prime is 91553219. The reversal of 91553216 is 61235519.

It is an interprime number because it is at equal distance from previous prime (91553213) and next prime (91553219).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91553213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36350 + ... + 38786.

It is an arithmetic number, because the mean of its divisors is an integer number (6502146).

Almost surely, 2^91553216 is an apocalyptic number.

It is an amenable number.

91553216 is a deficient number, since it is larger than the sum of its proper divisors (90506872).

91553216 is a wasteful number, since it uses less digits than its factorization.

91553216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036 (or 3026 counting only the distinct ones).

The product of its digits is 8100, while the sum is 32.

The square root of 91553216 is about 9568.3444754043. The cubic root of 91553216 is about 450.7037810468.

The spelling of 91553216 in words is "ninety-one million, five hundred fifty-three thousand, two hundred sixteen".