22539457 has 2 divisors, whose sum is σ = 22539458. Its totient is φ = 22539456.

The previous prime is 22539437. The next prime is 22539481. The reversal of 22539457 is 75493522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21893041 + 646416 = 4679^2 + 804^2 .

It is a cyclic number.

It is not a de Polignac number, because 22539457 - 2¹¹ = 22537409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22539427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11269728 + 11269729.

It is an arithmetic number, because the mean of its divisors is an integer number (11269729).

Almost surely, 2^22539457 is an apocalyptic number.

It is an amenable number.

22539457 is a deficient number, since it is larger than the sum of its proper divisors (1).

22539457 is an equidigital number, since it uses as much as digits as its factorization.

22539457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 37.

The square root of 22539457 is about 4747.5738014274. The cubic root of 22539457 is about 282.4757365540.

The spelling of 22539457 in words is "twenty-two million, five hundred thirty-nine thousand, four hundred fifty-seven".