255638241031 has 2 divisors, whose sum is σ = 255638241032. Its totient is φ = 255638241030.

The previous prime is 255638240999. The next prime is 255638241041. The reversal of 255638241031 is 130142836552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255638241031 - 2⁵ = 255638240999 is a prime.

It is a super-2 number, since 2×255638241031² (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 (255638241041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127819120515 + 127819120516.

It is an arithmetic number, because the mean of its divisors is an integer number (127819120516).

Almost surely, 2^255638241031 is an apocalyptic number.

255638241031 is a deficient number, since it is larger than the sum of its proper divisors (1).

255638241031 is an equidigital number, since it uses as much as digits as its factorization.

255638241031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 255638241031 in words is "two hundred fifty-five billion, six hundred thirty-eight million, two hundred forty-one thousand, thirty-one".