22553897 has 2 divisors, whose sum is σ = 22553898. Its totient is φ = 22553896.

The previous prime is 22553891. The next prime is 22553933. The reversal of 22553897 is 79835522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20693401 + 1860496 = 4549^2 + 1364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22553897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22553891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11276948 + 11276949.

It is an arithmetic number, because the mean of its divisors is an integer number (11276949).

Almost surely, 2^22553897 is an apocalyptic number.

It is an amenable number.

22553897 is a deficient number, since it is larger than the sum of its proper divisors (1).

22553897 is an equidigital number, since it uses as much as digits as its factorization.

22553897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 41.

The square root of 22553897 is about 4749.0943347127. The cubic root of 22553897 is about 282.5360467747.

The spelling of 22553897 in words is "twenty-two million, five hundred fifty-three thousand, eight hundred ninety-seven".