256051502131 has 16 divisors (see below), whose sum is σ = 272835763200. Its totient is φ = 239599327968.

The previous prime is 256051502117. The next prime is 256051502141. The reversal of 256051502131 is 131205150652.

It is a cyclic number.

It is not a de Polignac number, because 256051502131 - 2⁵ = 256051502099 is a prime.

It is a super-2 number, since 2×256051502131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256051502093 and 256051502102.

It is not an unprimeable number, because it can be changed into a prime (256051502141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8309605 + ... + 8340361.

It is an arithmetic number, because the mean of its divisors is an integer number (17052235200).

Almost surely, 2^256051502131 is an apocalyptic number.

256051502131 is a deficient number, since it is larger than the sum of its proper divisors (16784261069).

256051502131 is a wasteful number, since it uses less digits than its factorization.

256051502131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36138.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 256051502131 its reverse (131205150652), we get a palindrome (387256652783).

The spelling of 256051502131 in words is "two hundred fifty-six billion, fifty-one million, five hundred two thousand, one hundred thirty-one".