253565239 has 2 divisors, whose sum is σ = 253565240. Its totient is φ = 253565238.

The previous prime is 253565237. The next prime is 253565243. The reversal of 253565239 is 932565352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253565239 - 2¹ = 253565237 is a prime.

Together with 253565237, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253565237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126782619 + 126782620.

It is an arithmetic number, because the mean of its divisors is an integer number (126782620).

Almost surely, 2^253565239 is an apocalyptic number.

253565239 is a deficient number, since it is larger than the sum of its proper divisors (1).

253565239 is an equidigital number, since it uses as much as digits as its factorization.

253565239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243000, while the sum is 40.

The square root of 253565239 is about 15923.7319432349. The cubic root of 253565239 is about 632.9410144302.

The spelling of 253565239 in words is "two hundred fifty-three million, five hundred sixty-five thousand, two hundred thirty-nine".