255778843031 has 2 divisors, whose sum is σ = 255778843032. Its totient is φ = 255778843030.

The previous prime is 255778843013. The next prime is 255778843037. The reversal of 255778843031 is 130348877552.

Together with previous prime (255778843013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255778843031 - 2²⁶ = 255711734167 is a prime.

It is a super-2 number, since 2×255778843031² (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 (255778843037) 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, 127889421515 + 127889421516.

It is an arithmetic number, because the mean of its divisors is an integer number (127889421516).

Almost surely, 2^255778843031 is an apocalyptic number.

255778843031 is a deficient number, since it is larger than the sum of its proper divisors (1).

255778843031 is an equidigital number, since it uses as much as digits as its factorization.

255778843031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 255778843031 in words is "two hundred fifty-five billion, seven hundred seventy-eight million, eight hundred forty-three thousand, thirty-one".