23431312451 has 4 divisors (see below), whose sum is σ = 23828453400. Its totient is φ = 23034171504.

The previous prime is 23431312441. The next prime is 23431312477. The reversal of 23431312451 is 15421313432.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23431312451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23431312441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198570386 + ... + 198570503.

It is an arithmetic number, because the mean of its divisors is an integer number (5957113350).

Almost surely, 2^23431312451 is an apocalyptic number.

23431312451 is a deficient number, since it is larger than the sum of its proper divisors (397140949).

23431312451 is an equidigital number, since it uses as much as digits as its factorization.

23431312451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397140948.

The product of its digits is 8640, while the sum is 29.

Adding to 23431312451 its reverse (15421313432), we get a palindrome (38852625883).

The spelling of 23431312451 in words is "twenty-three billion, four hundred thirty-one million, three hundred twelve thousand, four hundred fifty-one".