31132451412 has 144 divisors (see below), whose sum is σ = 86605908480. Its totient is φ = 9757633248.

The previous prime is 31132451369. The next prime is 31132451419. The reversal of 31132451412 is 21415423113.

31132451412 is a `hidden beast` number, since 3 + 1 + 1 + 3 + 245 + 1 + 412 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31132451419) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1307203 + ... + 1330805.

It is an arithmetic number, because the mean of its divisors is an integer number (601429920).

Almost surely, 2^31132451412 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 31132451412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43302954240).

31132451412 is an abundant number, since it is smaller than the sum of its proper divisors (55473457068).

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

31132451412 is a wasteful number, since it uses less digits than its factorization.

31132451412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23704 (or 23690 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

Adding to 31132451412 its reverse (21415423113), we get a palindrome (52547874525).

The spelling of 31132451412 in words is "thirty-one billion, one hundred thirty-two million, four hundred fifty-one thousand, four hundred twelve".