91422261 has 12 divisors (see below), whose sum is σ = 150919392. Its totient is φ = 52241256.

The previous prime is 91422241. The next prime is 91422283. The reversal of 91422261 is 16222419.

It is not a de Polignac number, because 91422261 - 2⁵ = 91422229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91422241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 725511 + ... + 725636.

It is an arithmetic number, because the mean of its divisors is an integer number (12576616).

Almost surely, 2^91422261 is an apocalyptic number.

It is an amenable number.

91422261 is a deficient number, since it is larger than the sum of its proper divisors (59497131).

91422261 is a wasteful number, since it uses less digits than its factorization.

91422261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451160 (or 1451157 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 91422261 is about 9561.4988887726. The cubic root of 91422261 is about 450.4887874082.

The spelling of 91422261 in words is "ninety-one million, four hundred twenty-two thousand, two hundred sixty-one".