91227216 has 40 divisors (see below), whose sum is σ = 239672160. Its totient is φ = 29892736.

The previous prime is 91227181. The next prime is 91227217. The reversal of 91227216 is 61272219.

It is a super-2 number, since 2×91227216² = 16644809878221312, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91227217) 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, 13275 + ... + 18938.

It is an arithmetic number, because the mean of its divisors is an integer number (5991804).

Almost surely, 2^91227216 is an apocalyptic number.

It is an amenable number.

91227216 is an abundant number, since it is smaller than the sum of its proper divisors (148444944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91227216 is a wasteful number, since it uses less digits than its factorization.

91227216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32283 (or 32277 counting only the distinct ones).

The product of its digits is 3024, while the sum is 30.

The square root of 91227216 is about 9551.2939437544. The cubic root of 91227216 is about 450.1681939174.

The spelling of 91227216 in words is "ninety-one million, two hundred twenty-seven thousand, two hundred sixteen".