231321300 has 144 divisors (see below), whose sum is σ = 778283520. Its totient is φ = 51949440.

The previous prime is 231321191. The next prime is 231321301. The reversal of 231321300 is 3123132.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 231321300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231321301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122967 + ... + 124833.

Almost surely, 2^231321300 is an apocalyptic number.

231321300 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 231321300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389141760).

231321300 is an abundant number, since it is smaller than the sum of its proper divisors (546962220).

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

231321300 is a wasteful number, since it uses less digits than its factorization.

231321300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950 (or 1943 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 231321300 is about 15209.2504746289. The cubic root of 231321300 is about 613.8635898233.

Adding to 231321300 its reverse (3123132), we get a palindrome (234444432).

The spelling of 231321300 in words is "two hundred thirty-one million, three hundred twenty-one thousand, three hundred".