253231340161 has 2 divisors, whose sum is σ = 253231340162. Its totient is φ = 253231340160.

The previous prime is 253231340137. The next prime is 253231340171. The reversal of 253231340161 is 161043132352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196177240561 + 57054099600 = 442919^2 + 238860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253231340161 is a prime.

It is a super-2 number, since 2×253231340161² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (253231340171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126615670080 + 126615670081.

It is an arithmetic number, because the mean of its divisors is an integer number (126615670081).

Almost surely, 2^253231340161 is an apocalyptic number.

It is an amenable number.

253231340161 is a deficient number, since it is larger than the sum of its proper divisors (1).

253231340161 is an equidigital number, since it uses as much as digits as its factorization.

253231340161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 253231340161 in words is "two hundred fifty-three billion, two hundred thirty-one million, three hundred forty thousand, one hundred sixty-one".