320233312 has 48 divisors (see below), whose sum is σ = 745385760. Its totient is φ = 132507648.

The previous prime is 320233289. The next prime is 320233313. The reversal of 320233312 is 213332023.

It is a happy number.

It is a super-2 number, since 2×320233312² = 205098748228978688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320233312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320233313) 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, 18153 + ... + 31144.

It is an arithmetic number, because the mean of its divisors is an integer number (15528870).

Almost surely, 2^320233312 is an apocalyptic number.

320233312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

320233312 is an abundant number, since it is smaller than the sum of its proper divisors (425152448).

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

320233312 is a wasteful number, since it uses less digits than its factorization.

320233312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49343 (or 49335 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 320233312 is about 17895.0639004168. The cubic root of 320233312 is about 684.1565707487.

Adding to 320233312 its reverse (213332023), we get a palindrome (533565335).

The spelling of 320233312 in words is "three hundred twenty million, two hundred thirty-three thousand, three hundred twelve".