91222351 has 4 divisors (see below), whose sum is σ = 99515304. Its totient is φ = 82929400.

The previous prime is 91222349. The next prime is 91222361. The reversal of 91222351 is 15322219.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91222351 - 2¹ = 91222349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91222321) 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, 4146460 + ... + 4146481.

It is an arithmetic number, because the mean of its divisors is an integer number (24878826).

Almost surely, 2^91222351 is an apocalyptic number.

91222351 is a deficient number, since it is larger than the sum of its proper divisors (8292953).

91222351 is a wasteful number, since it uses less digits than its factorization.

91222351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8292952.

The product of its digits is 1080, while the sum is 25.

The square root of 91222351 is about 9551.0392628237. The cubic root of 91222351 is about 450.1601915277.

The spelling of 91222351 in words is "ninety-one million, two hundred twenty-two thousand, three hundred fifty-one".