231231000000 has 1764 divisors, whose sum is σ = 1053034802232. Its totient is φ = 44352000000.

The previous prime is 231230999999. The next prime is 231231000037. The reversal of 231231000000 is 132132.

It is a happy number.

It is a super-2 number, since 2×231231000000² (a number of 24 digits) contains 22 as substring.

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 231231000000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 251 ways as a sum of consecutive naturals, for example, 17786999994 + ... + 17787000006.

Almost surely, 2^231231000000 is an apocalyptic number.

231231000000 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 231231000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526517401116).

231231000000 is an abundant number, since it is smaller than the sum of its proper divisors (821803802232).

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

231231000000 is an equidigital number, since it uses as much as digits as its factorization.

231231000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 41 counting only the distinct ones).

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

Adding to 231231000000 its reverse (132132), we get a palindrome (231231132132).

It can be divided in two parts, 231 and 231000000, that multiplied together give a square (53361000000 = 231000²).

The spelling of 231231000000 in words is "two hundred thirty-one billion, two hundred thirty-one million", and thus it is an aban number.