233131320 has 48 divisors (see below), whose sum is σ = 757677960. Its totient is φ = 62168256.

The previous prime is 233131309. The next prime is 233131321. The reversal of 233131320 is 23131332.

233131320 is a `hidden beast` number, since 2 + 331 + 313 + 20 = 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 = 233131293 and 233131302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233131321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 323434 + ... + 324153.

Almost surely, 2^233131320 is an apocalyptic number.

233131320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

233131320 is an abundant number, since it is smaller than the sum of its proper divisors (524546640).

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

233131320 is a wasteful number, since it uses less digits than its factorization.

233131320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647604 (or 647597 counting only the distinct ones).

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

The square root of 233131320 is about 15268.6384461746. The cubic root of 233131320 is about 615.4605315157.

Adding to 233131320 its reverse (23131332), we get a palindrome (256262652).

The spelling of 233131320 in words is "two hundred thirty-three million, one hundred thirty-one thousand, three hundred twenty".