22157444 has 6 divisors (see below), whose sum is σ = 38775534. Its totient is φ = 11078720.

The previous prime is 22157417. The next prime is 22157459. The reversal of 22157444 is 44475122.

It can be written as a sum of positive squares in only one way, i.e., 20811844 + 1345600 = 4562^2 + 1160^2 .

It is a super-2 number, since 2×22157444² = 981904649226272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2769677 + ... + 2769684.

It is an arithmetic number, because the mean of its divisors is an integer number (6462589).

Almost surely, 2^22157444 is an apocalyptic number.

It is an amenable number.

22157444 is a deficient number, since it is larger than the sum of its proper divisors (16618090).

22157444 is a wasteful number, since it uses less digits than its factorization.

22157444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5539365 (or 5539363 counting only the distinct ones).

The product of its digits is 8960, while the sum is 29.

The square root of 22157444 is about 4707.1694254615. The cubic root of 22157444 is about 280.8707755514.

The spelling of 22157444 in words is "twenty-two million, one hundred fifty-seven thousand, four hundred forty-four".