251453132539991 has 2 divisors, whose sum is σ = 251453132539992. Its totient is φ = 251453132539990.

The previous prime is 251453132539963. The next prime is 251453132540009. The reversal of 251453132539991 is 199935231354152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251453132539991 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251453132539891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125726566269995 + 125726566269996.

It is an arithmetic number, because the mean of its divisors is an integer number (125726566269996).

Almost surely, 2^{251453132539991} is an apocalyptic number.

251453132539991 is a deficient number, since it is larger than the sum of its proper divisors (1).

251453132539991 is an equidigital number, since it uses as much as digits as its factorization.

251453132539991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39366000, while the sum is 62.

The spelling of 251453132539991 in words is "two hundred fifty-one trillion, four hundred fifty-three billion, one hundred thirty-two million, five hundred thirty-nine thousand, nine hundred ninety-one".