231233320 has 32 divisors (see below), whose sum is σ = 550881000. Its totient is φ = 87052288.

The previous prime is 231233293. The next prime is 231233341. The reversal of 231233320 is 23332132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 206611876 + 24621444 = 14374^2 + 4962^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169345 + ... + 170704.

Almost surely, 2^231233320 is an apocalyptic number.

231233320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231233320 is an abundant number, since it is smaller than the sum of its proper divisors (319647680).

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

231233320 is a wasteful number, since it uses less digits than its factorization.

231233320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340077 (or 340073 counting only the distinct ones).

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

The square root of 231233320 is about 15206.3578808339. The cubic root of 231233320 is about 613.7857549862.

Adding to 231233320 its reverse (23332132), we get a palindrome (254565452).

The spelling of 231233320 in words is "two hundred thirty-one million, two hundred thirty-three thousand, three hundred twenty".