251231344023 has 16 divisors (see below), whose sum is σ = 384660432000. Its totient is φ = 144247661280.

The previous prime is 251231343973. The next prime is 251231344031. The reversal of 251231344023 is 320443132152.

It is not a de Polignac number, because 251231344023 - 2⁶ = 251231343959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251231344033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200343348 + ... + 200344601.

It is an arithmetic number, because the mean of its divisors is an integer number (24041277000).

Almost surely, 2^251231344023 is an apocalyptic number.

251231344023 is a deficient number, since it is larger than the sum of its proper divisors (133429087977).

251231344023 is a wasteful number, since it uses less digits than its factorization.

251231344023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400687982.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 251231344023 its reverse (320443132152), we get a palindrome (571674476175).

The spelling of 251231344023 in words is "two hundred fifty-one billion, two hundred thirty-one million, three hundred forty-four thousand, twenty-three".