231312000000 has 616 divisors, whose sum is σ = 793202346880. Its totient is φ = 59904000000.

The previous prime is 231311999999. The next prime is 231312000001. The reversal of 231312000000 is 213132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (231311999999) and next prime (231312000001).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 231312000000.

It is not an unprimeable number, because it can be changed into a prime (231312000001) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2927999961 + ... + 2928000039.

Almost surely, 2^231312000000 is an apocalyptic number.

231312000000 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 231312000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396601173440).

231312000000 is an abundant number, since it is smaller than the sum of its proper divisors (561890346880).

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

231312000000 is an frugal number, since it uses more digits than its factorization.

231312000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 231312000000 its reverse (213132), we get a palindrome (231312213132).

The spelling of 231312000000 in words is "two hundred thirty-one billion, three hundred twelve million", and thus it is an aban number.