23431213 has 8 divisors (see below), whose sum is σ = 25849656. Its totient is φ = 21100800.

The previous prime is 23431211. The next prime is 23431231. The reversal of 23431213 is 31213432.

It can be written as a sum of positive squares in 4 ways, for example, as 218089 + 23213124 = 467^2 + 4818^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 23431213 - 2¹ = 23431211 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 (23431211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21448 + ... + 22513.

It is an arithmetic number, because the mean of its divisors is an integer number (3231207).

Almost surely, 2^23431213 is an apocalyptic number.

It is an amenable number.

23431213 is a deficient number, since it is larger than the sum of its proper divisors (2418443).

23431213 is a wasteful number, since it uses less digits than its factorization.

23431213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44015.

The product of its digits is 432, while the sum is 19.

The square root of 23431213 is about 4840.5798206413. The cubic root of 23431213 is about 286.1529696622.

Adding to 23431213 its reverse (31213432), we get a palindrome (54644645).

The spelling of 23431213 in words is "twenty-three million, four hundred thirty-one thousand, two hundred thirteen".