23131213 has 8 divisors (see below), whose sum is σ = 26670528. Its totient is φ = 19650624.

The previous prime is 23131211. The next prime is 23131231. The reversal of 23131213 is 31213132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23131213 - 2¹ = 23131211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13831 + ... + 15412.

It is an arithmetic number, because the mean of its divisors is an integer number (3333816).

Almost surely, 2^23131213 is an apocalyptic number.

It is an amenable number.

23131213 is a deficient number, since it is larger than the sum of its proper divisors (3539315).

23131213 is a wasteful number, since it uses less digits than its factorization.

23131213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29363.

The product of its digits is 108, while the sum is 16.

The square root of 23131213 is about 4809.4919690129. The cubic root of 23131213 is about 284.9264732866.

Adding to 23131213 its reverse (31213132), we get a palindrome (54344345).

The spelling of 23131213 in words is "twenty-three million, one hundred thirty-one thousand, two hundred thirteen".