251663301053 has 2 divisors, whose sum is σ = 251663301054. Its totient is φ = 251663301052.

The previous prime is 251663301023. The next prime is 251663301139. The reversal of 251663301053 is 350103366152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163978023364 + 87685277689 = 404942^2 + 296117^2 .

It is a cyclic number.

It is not a de Polignac number, because 251663301053 - 2¹² = 251663296957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251663301023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125831650526 + 125831650527.

It is an arithmetic number, because the mean of its divisors is an integer number (125831650527).

Almost surely, 2^251663301053 is an apocalyptic number.

It is an amenable number.

251663301053 is a deficient number, since it is larger than the sum of its proper divisors (1).

251663301053 is an equidigital number, since it uses as much as digits as its factorization.

251663301053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 35.

The spelling of 251663301053 in words is "two hundred fifty-one billion, six hundred sixty-three million, three hundred one thousand, fifty-three".