256700555231 has 2 divisors, whose sum is σ = 256700555232. Its totient is φ = 256700555230.

The previous prime is 256700555219. The next prime is 256700555249. The reversal of 256700555231 is 132555007652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256700555231 - 2¹⁴ = 256700538847 is a prime.

It is a super-2 number, since 2×256700555231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256700755231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128350277615 + 128350277616.

It is an arithmetic number, because the mean of its divisors is an integer number (128350277616).

Almost surely, 2^256700555231 is an apocalyptic number.

256700555231 is a deficient number, since it is larger than the sum of its proper divisors (1).

256700555231 is an equidigital number, since it uses as much as digits as its factorization.

256700555231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 315000, while the sum is 41.

The spelling of 256700555231 in words is "two hundred fifty-six billion, seven hundred million, five hundred fifty-five thousand, two hundred thirty-one".