31031310312 has 48 divisors (see below), whose sum is σ = 84987454500. Its totient is φ = 10227545856.

The previous prime is 31031310311. The next prime is 31031310319. The reversal of 31031310312 is 21301313013.

It is a happy number.

31031310312 is a `hidden beast` number, since 3 + 10 + 31 + 310 + 312 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28936051236 + 2095259076 = 170106^2 + 45774^2 .

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 (31031310311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2414887 + ... + 2427702.

Almost surely, 2^31031310312 is an apocalyptic number.

It is an amenable number.

31031310312 is an abundant number, since it is smaller than the sum of its proper divisors (53956144188).

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

31031310312 is a wasteful number, since it uses less digits than its factorization.

31031310312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4842690 (or 4842683 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31031310312 its reverse (21301313013), we get a palindrome (52332623325).

The spelling of 31031310312 in words is "thirty-one billion, thirty-one million, three hundred ten thousand, three hundred twelve".