31134243712 has 128 divisors (see below), whose sum is σ = 72985651200. Its totient is φ = 13042391040.

The previous prime is 31134243709. The next prime is 31134243713. The reversal of 31134243712 is 21734243113.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×31134243712² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31134243713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17699089 + ... + 17700847.

It is an arithmetic number, because the mean of its divisors is an integer number (570200400).

Almost surely, 2^31134243712 is an apocalyptic number.

31134243712 is a gapful number since it is divisible by the number (32) 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 31134243712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36492825600).

31134243712 is an abundant number, since it is smaller than the sum of its proper divisors (41851407488).

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

31134243712 is a wasteful number, since it uses less digits than its factorization.

31134243712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2764 (or 2752 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

Adding to 31134243712 its reverse (21734243113), we get a palindrome (52868486825).

The spelling of 31134243712 in words is "thirty-one billion, one hundred thirty-four million, two hundred forty-three thousand, seven hundred twelve".