251004795157 has 2 divisors, whose sum is σ = 251004795158. Its totient is φ = 251004795156.

The previous prime is 251004795113. The next prime is 251004795191. The reversal of 251004795157 is 751597400152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155836247121 + 95168548036 = 394761^2 + 308494^2 .

It is a cyclic number.

It is not a de Polignac number, because 251004795157 - 2⁷ = 251004795029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251004795557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125502397578 + 125502397579.

It is an arithmetic number, because the mean of its divisors is an integer number (125502397579).

Almost surely, 2^251004795157 is an apocalyptic number.

It is an amenable number.

251004795157 is a deficient number, since it is larger than the sum of its proper divisors (1).

251004795157 is an equidigital number, since it uses as much as digits as its factorization.

251004795157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 441000, while the sum is 46.

The spelling of 251004795157 in words is "two hundred fifty-one billion, four million, seven hundred ninety-five thousand, one hundred fifty-seven".