223031312 has 20 divisors (see below), whose sum is σ = 493855296. Its totient is φ = 95584800.

The previous prime is 223031293. The next prime is 223031323. The reversal of 223031312 is 213130322.

It is a super-2 number, since 2×223031312² = 99485932264882688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995564 + ... + 995787.

Almost surely, 2^223031312 is an apocalyptic number.

It is an amenable number.

223031312 is an abundant number, since it is smaller than the sum of its proper divisors (270823984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223031312 is a wasteful number, since it uses less digits than its factorization.

223031312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991366 (or 1991360 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 223031312 is about 14934.2328895729. The cubic root of 223031312 is about 606.4410807748.

Adding to 223031312 its reverse (213130322), we get a palindrome (436161634).

The spelling of 223031312 in words is "two hundred twenty-three million, thirty-one thousand, three hundred twelve".