231234320 has 20 divisors (see below), whose sum is σ = 537619980. Its totient is φ = 92493696.

The previous prime is 231234319. The next prime is 231234329. The reversal of 231234320 is 23432132.

It can be written as a sum of positive squares in 2 ways, for example, as 175403536 + 55830784 = 13244^2 + 7472^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 231234292 and 231234301.

It is not an unprimeable number, because it can be changed into a prime (231234329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1445135 + ... + 1445294.

It is an arithmetic number, because the mean of its divisors is an integer number (26880999).

Almost surely, 2^231234320 is an apocalyptic number.

231234320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231234320 is an abundant number, since it is smaller than the sum of its proper divisors (306385660).

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

231234320 is a wasteful number, since it uses less digits than its factorization.

231234320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890442 (or 2890436 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 231234320 is about 15206.3907617817. The cubic root of 231234320 is about 613.7866397850.

Adding to 231234320 its reverse (23432132), we get a palindrome (254666452).

The spelling of 231234320 in words is "two hundred thirty-one million, two hundred thirty-four thousand, three hundred twenty".