22919557 has 2 divisors, whose sum is σ = 22919558. Its totient is φ = 22919556.

The previous prime is 22919551. The next prime is 22919609. The reversal of 22919557 is 75591922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19236996 + 3682561 = 4386^2 + 1919^2 .

It is a cyclic number.

It is not a de Polignac number, because 22919557 - 2²³ = 14530949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22919551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11459778 + 11459779.

It is an arithmetic number, because the mean of its divisors is an integer number (11459779).

Almost surely, 2^22919557 is an apocalyptic number.

It is an amenable number.

22919557 is a deficient number, since it is larger than the sum of its proper divisors (1).

22919557 is an equidigital number, since it uses as much as digits as its factorization.

22919557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 40.

The square root of 22919557 is about 4787.4374147345. The cubic root of 22919557 is about 284.0547611456.

The spelling of 22919557 in words is "twenty-two million, nine hundred nineteen thousand, five hundred fifty-seven".