23213331 has 16 divisors (see below), whose sum is σ = 34657920. Its totient is φ = 15355080.

The previous prime is 23213317. The next prime is 23213341. The reversal of 23213331 is 13331232.

It is a de Polignac number, because none of the positive numbers 2^k-23213331 is a prime.

It is a super-2 number, since 2×23213331² = 1077717472231122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23213341) 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 15 ways as a sum of consecutive naturals, for example, 256 + ... + 6818.

It is an arithmetic number, because the mean of its divisors is an integer number (2166120).

Almost surely, 2^23213331 is an apocalyptic number.

23213331 is a deficient number, since it is larger than the sum of its proper divisors (11444589).

23213331 is a wasteful number, since it uses less digits than its factorization.

23213331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6703 (or 6697 counting only the distinct ones).

The product of its digits is 324, while the sum is 18.

The square root of 23213331 is about 4818.0214818948. The cubic root of 23213331 is about 285.2632470754.

Adding to 23213331 its reverse (13331232), we get a palindrome (36544563).

The spelling of 23213331 in words is "twenty-three million, two hundred thirteen thousand, three hundred thirty-one".