252644137 has 2 divisors, whose sum is σ = 252644138. Its totient is φ = 252644136.

The previous prime is 252644131. The next prime is 252644149. The reversal of 252644137 is 731446252.

252644137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191241241 + 61402896 = 13829^2 + 7836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252644137 is a prime.

It is not a weakly prime, because it can be changed into another prime (252644131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126322068 + 126322069.

It is an arithmetic number, because the mean of its divisors is an integer number (126322069).

Almost surely, 2^252644137 is an apocalyptic number.

It is an amenable number.

252644137 is a deficient number, since it is larger than the sum of its proper divisors (1).

252644137 is an equidigital number, since it uses as much as digits as its factorization.

252644137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 34.

The square root of 252644137 is about 15894.7833266138. The cubic root of 252644137 is about 632.1736765982.

The spelling of 252644137 in words is "two hundred fifty-two million, six hundred forty-four thousand, one hundred thirty-seven".