251453132539891 has 2 divisors, whose sum is σ = 251453132539892. Its totient is φ = 251453132539890.

The previous prime is 251453132539871. The next prime is 251453132539907. The reversal of 251453132539891 is 198935231354152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251453132539891 - 2¹¹ = 251453132537843 is a prime.

It is not a weakly prime, because it can be changed into another prime (251453132539871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125726566269945 + 125726566269946.

It is an arithmetic number, because the mean of its divisors is an integer number (125726566269946).

Almost surely, 2^{251453132539891} is an apocalyptic number.

251453132539891 is a deficient number, since it is larger than the sum of its proper divisors (1).

251453132539891 is an equidigital number, since it uses as much as digits as its factorization.

251453132539891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992000, while the sum is 61.

The spelling of 251453132539891 in words is "two hundred fifty-one trillion, four hundred fifty-three billion, one hundred thirty-two million, five hundred thirty-nine thousand, eight hundred ninety-one".