31031231000000 has 392 divisors, whose sum is σ = 95964099143808. Its totient is φ = 9672048000000.

The previous prime is 31031230999999. The next prime is 31031231000027. The reversal of 31031231000000 is 13213013.

It is a super-2 number, since 2×31031231000000² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 76798499 + ... + 77201501.

Almost surely, 2^{31031231000000} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31031231000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47982049571904).

31031231000000 is an abundant number, since it is smaller than the sum of its proper divisors (64932868143808).

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

31031231000000 is an frugal number, since it uses more digits than its factorization.

31031231000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403063 (or 403028 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 31031231000000 its reverse (13213013), we get a palindrome (31031244213013).

The spelling of 31031231000000 in words is "thirty-one trillion, thirty-one billion, two hundred thirty-one million", and thus it is an aban number.