231312004400 has 120 divisors (see below), whose sum is σ = 559025831664. Its totient is φ = 91977318400.

The previous prime is 231312004393. The next prime is 231312004411. The reversal of 231312004400 is 4400213132.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48994040 + ... + 48998760.

Almost surely, 2^231312004400 is an apocalyptic number.

231312004400 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 231312004400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279512915832).

231312004400 is an abundant number, since it is smaller than the sum of its proper divisors (327713827264).

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

231312004400 is a wasteful number, since it uses less digits than its factorization.

231312004400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5439 (or 5428 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 231312004400 its reverse (4400213132), we get a palindrome (235712217532).

The spelling of 231312004400 in words is "two hundred thirty-one billion, three hundred twelve million, four thousand, four hundred".