31544343512 has 64 divisors (see below), whose sum is σ = 67633695360. Its totient is φ = 13663238400.

The previous prime is 31544343503. The next prime is 31544343517. The reversal of 31544343512 is 21534344513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31544343517) 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, 53483 + ... + 256805.

It is an arithmetic number, because the mean of its divisors is an integer number (1056776490).

Almost surely, 2^31544343512 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 31544343512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33816847680).

31544343512 is an abundant number, since it is smaller than the sum of its proper divisors (36089351848).

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

31544343512 is a wasteful number, since it uses less digits than its factorization.

31544343512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203424 (or 203420 counting only the distinct ones).

The product of its digits is 86400, while the sum is 35.

The spelling of 31544343512 in words is "thirty-one billion, five hundred forty-four million, three hundred forty-three thousand, five hundred twelve".