251255334263 has 2 divisors, whose sum is σ = 251255334264. Its totient is φ = 251255334262.

The previous prime is 251255334217. The next prime is 251255334271. The reversal of 251255334263 is 362433552152.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251255334263 - 2¹⁰ = 251255333239 is a prime.

It is a super-2 number, since 2×251255334263² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 251255334263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251255364263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125627667131 + 125627667132.

It is an arithmetic number, because the mean of its divisors is an integer number (125627667132).

Almost surely, 2^251255334263 is an apocalyptic number.

251255334263 is a deficient number, since it is larger than the sum of its proper divisors (1).

251255334263 is an equidigital number, since it uses as much as digits as its factorization.

251255334263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 41.

The spelling of 251255334263 in words is "two hundred fifty-one billion, two hundred fifty-five million, three hundred thirty-four thousand, two hundred sixty-three".