251261275351 has 2 divisors, whose sum is σ = 251261275352. Its totient is φ = 251261275350.

The previous prime is 251261275319. The next prime is 251261275381. The reversal of 251261275351 is 153572162152.

251261275351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251261275351 - 2⁵ = 251261275319 is a prime.

It is a super-2 number, since 2×251261275351² (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 (251261275301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125630637675 + 125630637676.

It is an arithmetic number, because the mean of its divisors is an integer number (125630637676).

Almost surely, 2^251261275351 is an apocalyptic number.

251261275351 is a deficient number, since it is larger than the sum of its proper divisors (1).

251261275351 is an equidigital number, since it uses as much as digits as its factorization.

251261275351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 40.

The spelling of 251261275351 in words is "two hundred fifty-one billion, two hundred sixty-one million, two hundred seventy-five thousand, three hundred fifty-one".