251716472136131 has 2 divisors, whose sum is σ = 251716472136132. Its totient is φ = 251716472136130.

The previous prime is 251716472136097. The next prime is 251716472136179. The reversal of 251716472136131 is 131631274617152.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251716472136131 is a prime.

It is a super-2 number, since 2×251716472136131² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251716472136131.

It is not a weakly prime, because it can be changed into another prime (251716472136331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125858236068065 + 125858236068066.

It is an arithmetic number, because the mean of its divisors is an integer number (125858236068066).

Almost surely, 2^{251716472136131} is an apocalyptic number.

251716472136131 is a deficient number, since it is larger than the sum of its proper divisors (1).

251716472136131 is an equidigital number, since it uses as much as digits as its factorization.

251716472136131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 50.

The spelling of 251716472136131 in words is "two hundred fifty-one trillion, seven hundred sixteen billion, four hundred seventy-two million, one hundred thirty-six thousand, one hundred thirty-one".