251055678431 has 2 divisors, whose sum is σ = 251055678432. Its totient is φ = 251055678430.

The previous prime is 251055678373. The next prime is 251055678443. The reversal of 251055678431 is 134876550152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251055678431 - 2²² = 251051484127 is a prime.

It is a super-2 number, since 2×251055678431² (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 (251055678631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125527839215 + 125527839216.

It is an arithmetic number, because the mean of its divisors is an integer number (125527839216).

Almost surely, 2^251055678431 is an apocalyptic number.

251055678431 is a deficient number, since it is larger than the sum of its proper divisors (1).

251055678431 is an equidigital number, since it uses as much as digits as its factorization.

251055678431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 251055678431 in words is "two hundred fifty-one billion, fifty-five million, six hundred seventy-eight thousand, four hundred thirty-one".