231444320 has 72 divisors (see below), whose sum is σ = 577224144. Its totient is φ = 87683328.

The previous prime is 231444319. The next prime is 231444337. The reversal of 231444320 is 23444132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55757 + ... + 59763.

It is an arithmetic number, because the mean of its divisors is an integer number (8017002).

Almost surely, 2^231444320 is an apocalyptic number.

231444320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231444320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288612072).

231444320 is an abundant number, since it is smaller than the sum of its proper divisors (345779824).

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

231444320 is a wasteful number, since it uses less digits than its factorization.

231444320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060 (or 4033 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 231444320 is about 15213.2941863358. The cubic root of 231444320 is about 613.9723910386.

Adding to 231444320 its reverse (23444132), we get a palindrome (254888452).

The spelling of 231444320 in words is "two hundred thirty-one million, four hundred forty-four thousand, three hundred twenty".