253645237931 has 2 divisors, whose sum is σ = 253645237932. Its totient is φ = 253645237930.

The previous prime is 253645237927. The next prime is 253645237933. The reversal of 253645237931 is 139732546352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253645237931 - 2² = 253645237927 is a prime.

It is a super-2 number, since 2×253645237931² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 253645237933, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 253645237931.

It is not a weakly prime, because it can be changed into another prime (253645237933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126822618965 + 126822618966.

It is an arithmetic number, because the mean of its divisors is an integer number (126822618966).

Almost surely, 2^253645237931 is an apocalyptic number.

253645237931 is a deficient number, since it is larger than the sum of its proper divisors (1).

253645237931 is an equidigital number, since it uses as much as digits as its factorization.

253645237931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4082400, while the sum is 50.

The spelling of 253645237931 in words is "two hundred fifty-three billion, six hundred forty-five million, two hundred thirty-seven thousand, nine hundred thirty-one".