22685857 has 2 divisors, whose sum is σ = 22685858. Its totient is φ = 22685856.

The previous prime is 22685821. The next prime is 22685879. The reversal of 22685857 is 75858622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15374241 + 7311616 = 3921^2 + 2704^2 .

It is a cyclic number.

It is not a de Polignac number, because 22685857 - 2²³ = 14297249 is a prime.

It is not a weakly prime, because it can be changed into another prime (22685807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11342928 + 11342929.

It is an arithmetic number, because the mean of its divisors is an integer number (11342929).

Almost surely, 2^22685857 is an apocalyptic number.

It is an amenable number.

22685857 is a deficient number, since it is larger than the sum of its proper divisors (1).

22685857 is an equidigital number, since it uses as much as digits as its factorization.

22685857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 43.

The square root of 22685857 is about 4762.9672474205. The cubic root of 22685857 is about 283.0860031536.

The spelling of 22685857 in words is "twenty-two million, six hundred eighty-five thousand, eight hundred fifty-seven".