231043320 has 64 divisors (see below), whose sum is σ = 770148000. Its totient is φ = 61611264.

The previous prime is 231043313. The next prime is 231043339. The reversal of 231043320 is 23340132.

231043320 is a `hidden beast` number, since 231 + 0 + 433 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231043293 and 231043302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105885 + ... + 108044.

Almost surely, 2^231043320 is an apocalyptic number.

231043320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231043320 is an abundant number, since it is smaller than the sum of its proper divisors (539104680).

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

231043320 is a wasteful number, since it uses less digits than its factorization.

231043320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213949 (or 213939 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 231043320 is about 15200.1092101340. The cubic root of 231043320 is about 613.6175969120.

Adding to 231043320 its reverse (23340132), we get a palindrome (254383452).

The spelling of 231043320 in words is "two hundred thirty-one million, forty-three thousand, three hundred twenty".