22751091 has 16 divisors (see below), whose sum is σ = 36769920. Its totient is φ = 13788360.

The previous prime is 22751087. The next prime is 22751093. The reversal of 22751091 is 19015722.

It is not a de Polignac number, because 22751091 - 2² = 22751087 is a prime.

It is a super-2 number, since 2×22751091² = 1035224283380562, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22751093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38005 + ... + 38598.

It is an arithmetic number, because the mean of its divisors is an integer number (2298120).

Almost surely, 2^22751091 is an apocalyptic number.

22751091 is a deficient number, since it is larger than the sum of its proper divisors (14018829).

22751091 is a wasteful number, since it uses less digits than its factorization.

22751091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76623 (or 76617 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 22751091 is about 4769.8103735893. The cubic root of 22751091 is about 283.3570848217.

The spelling of 22751091 in words is "twenty-two million, seven hundred fifty-one thousand, ninety-one".