251441968031 has 2 divisors, whose sum is σ = 251441968032. Its totient is φ = 251441968030.

The previous prime is 251441968027. The next prime is 251441968061. The reversal of 251441968031 is 130869144152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251441968031 - 2² = 251441968027 is a prime.

It is a super-2 number, since 2×251441968031² (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 (251441968061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125720984015 + 125720984016.

It is an arithmetic number, because the mean of its divisors is an integer number (125720984016).

Almost surely, 2^251441968031 is an apocalyptic number.

251441968031 is a deficient number, since it is larger than the sum of its proper divisors (1).

251441968031 is an equidigital number, since it uses as much as digits as its factorization.

251441968031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 251441968031 in words is "two hundred fifty-one billion, four hundred forty-one million, nine hundred sixty-eight thousand, thirty-one".