255531656131 has 2 divisors, whose sum is σ = 255531656132. Its totient is φ = 255531656130.

The previous prime is 255531656129. The next prime is 255531656141. The reversal of 255531656131 is 131656135552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255531656131 - 2¹ = 255531656129 is a prime.

It is a super-2 number, since 2×255531656131² (a number of 24 digits) contains 22 as substring.

Together with 255531656129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (255531656141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127765828065 + 127765828066.

It is an arithmetic number, because the mean of its divisors is an integer number (127765828066).

Almost surely, 2^255531656131 is an apocalyptic number.

255531656131 is a deficient number, since it is larger than the sum of its proper divisors (1).

255531656131 is an equidigital number, since it uses as much as digits as its factorization.

255531656131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405000, while the sum is 43.

The spelling of 255531656131 in words is "two hundred fifty-five billion, five hundred thirty-one million, six hundred fifty-six thousand, one hundred thirty-one".