253442557 has 2 divisors, whose sum is σ = 253442558. Its totient is φ = 253442556.

The previous prime is 253442509. The next prime is 253442561. The reversal of 253442557 is 755244352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227828836 + 25613721 = 15094^2 + 5061^2 .

It is a cyclic number.

It is not a de Polignac number, because 253442557 - 2⁷ = 253442429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253442257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126721278 + 126721279.

It is an arithmetic number, because the mean of its divisors is an integer number (126721279).

Almost surely, 2^253442557 is an apocalyptic number.

It is an amenable number.

253442557 is a deficient number, since it is larger than the sum of its proper divisors (1).

253442557 is an equidigital number, since it uses as much as digits as its factorization.

253442557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168000, while the sum is 37.

The square root of 253442557 is about 15919.8793023063. The cubic root of 253442557 is about 632.8389197367.

The spelling of 253442557 in words is "two hundred fifty-three million, four hundred forty-two thousand, five hundred fifty-seven".