31831363312 has 80 divisors (see below), whose sum is σ = 75218042880. Its totient is φ = 12738345984.

The previous prime is 31831363307. The next prime is 31831363327. The reversal of 31831363312 is 21336313813.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175989 + ... + 307627.

It is an arithmetic number, because the mean of its divisors is an integer number (940225536).

Almost surely, 2^31831363312 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 31831363312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37609021440).

31831363312 is an abundant number, since it is smaller than the sum of its proper divisors (43386679568).

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

31831363312 is a wasteful number, since it uses less digits than its factorization.

31831363312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131798 (or 131792 counting only the distinct ones).

The product of its digits is 23328, while the sum is 34.

The spelling of 31831363312 in words is "thirty-one billion, eight hundred thirty-one million, three hundred sixty-three thousand, three hundred twelve".