251132271667 has 2 divisors, whose sum is σ = 251132271668. Its totient is φ = 251132271666.

The previous prime is 251132271653. The next prime is 251132271757. The reversal of 251132271667 is 766172231152.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251132271667 is a prime.

It is not a weakly prime, because it can be changed into another prime (251132271617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125566135833 + 125566135834.

It is an arithmetic number, because the mean of its divisors is an integer number (125566135834).

Almost surely, 2^251132271667 is an apocalyptic number.

251132271667 is a deficient number, since it is larger than the sum of its proper divisors (1).

251132271667 is an equidigital number, since it uses as much as digits as its factorization.

251132271667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The spelling of 251132271667 in words is "two hundred fifty-one billion, one hundred thirty-two million, two hundred seventy-one thousand, six hundred sixty-seven".