231383320 has 128 divisors (see below), whose sum is σ = 614615040. Its totient is φ = 76769280.

The previous prime is 231383297. The next prime is 231383371. The reversal of 231383320 is 23383132.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2047584 + ... + 2047696.

It is an arithmetic number, because the mean of its divisors is an integer number (4801680).

Almost surely, 2^231383320 is an apocalyptic number.

231383320 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 231383320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307307520).

231383320 is an abundant number, since it is smaller than the sum of its proper divisors (383231720).

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

231383320 is a wasteful number, since it uses less digits than its factorization.

231383320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 231383320 is about 15211.2892287275. The cubic root of 231383320 is about 613.9184463048.

The spelling of 231383320 in words is "two hundred thirty-one million, three hundred eighty-three thousand, three hundred twenty".