231312400 has 60 divisors (see below), whose sum is σ = 606260304. Its totient is φ = 84112000.

The previous prime is 231312377. The next prime is 231312401. The reversal of 231312400 is 4213132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (231312401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21886 + ... + 30685.

Almost surely, 2^231312400 is an apocalyptic number.

231312400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231312400 is an abundant number, since it is smaller than the sum of its proper divisors (374947904).

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

231312400 is a wasteful number, since it uses less digits than its factorization.

231312400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52600 (or 52589 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 231312400 is about 15208.9578867193. The cubic root of 231312400 is about 613.8557169988.

Adding to 231312400 its reverse (4213132), we get a palindrome (235525532).

The spelling of 231312400 in words is "two hundred thirty-one million, three hundred twelve thousand, four hundred".