23131451 has 4 divisors (see below), whose sum is σ = 26435952. Its totient is φ = 19826952.

The previous prime is 23131429. The next prime is 23131453. The reversal of 23131451 is 15413132.

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

It is a cyclic number.

It is not a de Polignac number, because 23131451 - 2⁶ = 23131387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131453) 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, 1652240 + ... + 1652253.

It is an arithmetic number, because the mean of its divisors is an integer number (6608988).

Almost surely, 2^23131451 is an apocalyptic number.

23131451 is a deficient number, since it is larger than the sum of its proper divisors (3304501).

23131451 is an equidigital number, since it uses as much as digits as its factorization.

23131451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3304500.

The product of its digits is 360, while the sum is 20.

The square root of 23131451 is about 4809.5167116874. The cubic root of 23131451 is about 284.9274504982.

Adding to 23131451 its reverse (15413132), we get a palindrome (38544583).

The spelling of 23131451 in words is "twenty-three million, one hundred thirty-one thousand, four hundred fifty-one".