91282257 has 12 divisors (see below), whose sum is σ = 143838864. Its totient is φ = 55322520.

The previous prime is 91282253. The next prime is 91282283. The reversal of 91282257 is 75228219.

It is not a de Polignac number, because 91282257 - 2² = 91282253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91282253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 460923 + ... + 461120.

It is an arithmetic number, because the mean of its divisors is an integer number (11986572).

Almost surely, 2^91282257 is an apocalyptic number.

It is an amenable number.

91282257 is a deficient number, since it is larger than the sum of its proper divisors (52556607).

91282257 is a wasteful number, since it uses less digits than its factorization.

91282257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922060 (or 922057 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 91282257 is about 9554.1748466312. The cubic root of 91282257 is about 450.2587104949.

The spelling of 91282257 in words is "ninety-one million, two hundred eighty-two thousand, two hundred fifty-seven".