31020033312 has 36 divisors (see below), whose sum is σ = 88213220550. Its totient is φ = 10340011008.

The previous prime is 31020033311. The next prime is 31020033349. The reversal of 31020033312 is 21333002013.

31020033312 is a `hidden beast` number, since 310 + 20 + 0 + 3 + 331 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30430709136 + 589324176 = 174444^2 + 24276^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31020033311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53853937 + ... + 53854512.

Almost surely, 2^31020033312 is an apocalyptic number.

31020033312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31020033312 is an abundant number, since it is smaller than the sum of its proper divisors (57193187238).

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

31020033312 is a wasteful number, since it uses less digits than its factorization.

31020033312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107708465 (or 107708454 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 31020033312 its reverse (21333002013), we get a palindrome (52353035325).

The spelling of 31020033312 in words is "thirty-one billion, twenty million, thirty-three thousand, three hundred twelve".