8131312244 has 12 divisors (see below), whose sum is σ = 15523414368. Its totient is φ = 3696051000.

The previous prime is 8131312243. The next prime is 8131312271. The reversal of 8131312244 is 4422131318.

It is a super-2 number, since 2×8131312244² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8131312243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92401232 + ... + 92401319.

It is an arithmetic number, because the mean of its divisors is an integer number (1293617864).

Almost surely, 2^8131312244 is an apocalyptic number.

It is an amenable number.

8131312244 is a deficient number, since it is larger than the sum of its proper divisors (7392102124).

8131312244 is a wasteful number, since it uses less digits than its factorization.

8131312244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184802566 (or 184802564 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 8131312244 is about 90173.7891185682. The cubic root of 8131312244 is about 2010.8833558572.

The spelling of 8131312244 in words is "eight billion, one hundred thirty-one million, three hundred twelve thousand, two hundred forty-four".