255387518101931 has 2 divisors, whose sum is σ = 255387518101932. Its totient is φ = 255387518101930.

The previous prime is 255387518101883. The next prime is 255387518101993. The reversal of 255387518101931 is 139101815783552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255387518101931 - 2⁶ = 255387518101867 is a prime.

It is a super-2 number, since 2×255387518101931² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (255387518101631) 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, 127693759050965 + 127693759050966.

It is an arithmetic number, because the mean of its divisors is an integer number (127693759050966).

Almost surely, 2^{255387518101931} is an apocalyptic number.

255387518101931 is a deficient number, since it is larger than the sum of its proper divisors (1).

255387518101931 is an equidigital number, since it uses as much as digits as its factorization.

255387518101931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072000, while the sum is 59.

The spelling of 255387518101931 in words is "two hundred fifty-five trillion, three hundred eighty-seven billion, five hundred eighteen million, one hundred one thousand, nine hundred thirty-one".