251231545253123 has 2 divisors, whose sum is σ = 251231545253124. Its totient is φ = 251231545253122.

The previous prime is 251231545253099. The next prime is 251231545253203. The reversal of 251231545253123 is 321352545132152.

251231545253123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251231545253123 - 2²⁶ = 251231478144259 is a prime.

It is not a weakly prime, because it can be changed into another prime (251231545253323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125615772626561 + 125615772626562.

It is an arithmetic number, because the mean of its divisors is an integer number (125615772626562).

Almost surely, 2^{251231545253123} is an apocalyptic number.

251231545253123 is a deficient number, since it is larger than the sum of its proper divisors (1).

251231545253123 is an equidigital number, since it uses as much as digits as its factorization.

251231545253123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080000, while the sum is 44.

The spelling of 251231545253123 in words is "two hundred fifty-one trillion, two hundred thirty-one billion, five hundred forty-five million, two hundred fifty-three thousand, one hundred twenty-three".