23131499 has 4 divisors (see below), whose sum is σ = 23154600. Its totient is φ = 23108400.

The previous prime is 23131483. The next prime is 23131513. The reversal of 23131499 is 99413132.

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 23131499 - 2⁴ = 23131483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131429) 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, 9977 + ... + 12074.

It is an arithmetic number, because the mean of its divisors is an integer number (5788650).

Almost surely, 2^23131499 is an apocalyptic number.

23131499 is a deficient number, since it is larger than the sum of its proper divisors (23101).

23131499 is a wasteful number, since it uses less digits than its factorization.

23131499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23100.

The product of its digits is 5832, while the sum is 32.

The square root of 23131499 is about 4809.5217017911. The cubic root of 23131499 is about 284.9276475821.

The spelling of 23131499 in words is "twenty-three million, one hundred thirty-one thousand, four hundred ninety-nine".