31130022312 has 24 divisors (see below), whose sum is σ = 84310477290. Its totient is φ = 10376674080.

The previous prime is 31130022269. The next prime is 31130022331. The reversal of 31130022312 is 21322003113.

31130022312 is a `hidden beast` number, since 31 + 1 + 300 + 22 + 312 = 666.

It can be written as a sum of positive squares in only one way, i.e., 25781440356 + 5348581956 = 160566^2 + 73134^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216180639 + ... + 216180782.

Almost surely, 2^31130022312 is an apocalyptic number.

It is an amenable number.

31130022312 is an abundant number, since it is smaller than the sum of its proper divisors (53180454978).

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

31130022312 is a wasteful number, since it uses less digits than its factorization.

31130022312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432361433 (or 432361426 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31130022312 its reverse (21322003113), we get a palindrome (52452025425).

The spelling of 31130022312 in words is "thirty-one billion, one hundred thirty million, twenty-two thousand, three hundred twelve".