231340320 has 96 divisors (see below), whose sum is σ = 809706240. Its totient is φ = 61689600.

The previous prime is 231340309. The next prime is 231340393. The reversal of 231340320 is 23043132.

231340320 is a `hidden beast` number, since 2 + 3 + 1 + 340 + 320 = 666.

231340320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

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 = 231340293 and 231340302.

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, 22456 + ... + 31095.

It is an arithmetic number, because the mean of its divisors is an integer number (8434440).

Almost surely, 2^231340320 is an apocalyptic number.

231340320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231340320 is an abundant number, since it is smaller than the sum of its proper divisors (578365920).

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

231340320 is a wasteful number, since it uses less digits than its factorization.

231340320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53575 (or 53561 counting only the distinct ones).

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

The square root of 231340320 is about 15209.8757391374. The cubic root of 231340320 is about 613.8804139917.

Adding to 231340320 its reverse (23043132), we get a palindrome (254383452).

The spelling of 231340320 in words is "two hundred thirty-one million, three hundred forty thousand, three hundred twenty".