31683312 has 120 divisors (see below), whose sum is σ = 95462640. Its totient is φ = 10160640.

The previous prime is 31683299. The next prime is 31683329. The reversal of 31683312 is 21338613.

It is a happy number.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112612 + ... + 112892.

It is an arithmetic number, because the mean of its divisors is an integer number (795522).

Almost surely, 2^31683312 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 31683312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47731320).

31683312 is an abundant number, since it is smaller than the sum of its proper divisors (63779328).

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

31683312 is a wasteful number, since it uses less digits than its factorization.

31683312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 315 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 31683312 is about 5628.7931210873. The cubic root of 31683312 is about 316.4294220560.

The spelling of 31683312 in words is "thirty-one million, six hundred eighty-three thousand, three hundred twelve".