256514161313 has 2 divisors, whose sum is σ = 256514161314. Its totient is φ = 256514161312.

The previous prime is 256514161307. The next prime is 256514161331. The reversal of 256514161313 is 313161415652.

Together with next prime (256514161331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180907310224 + 75606851089 = 425332^2 + 274967^2 .

It is a cyclic number.

It is not a de Polignac number, because 256514161313 - 2²² = 256509967009 is a prime.

It is a super-2 number, since 2×256514161313² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (256514191313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128257080656 + 128257080657.

It is an arithmetic number, because the mean of its divisors is an integer number (128257080657).

Almost surely, 2^256514161313 is an apocalyptic number.

It is an amenable number.

256514161313 is a deficient number, since it is larger than the sum of its proper divisors (1).

256514161313 is an equidigital number, since it uses as much as digits as its factorization.

256514161313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

Adding to 256514161313 its reverse (313161415652), we get a palindrome (569675576965).

The spelling of 256514161313 in words is "two hundred fifty-six billion, five hundred fourteen million, one hundred sixty-one thousand, three hundred thirteen".