31140044022 has 16 divisors (see below), whose sum is σ = 62501728752. Its totient is φ = 10343074560.

The previous prime is 31140044021. The next prime is 31140044027. The reversal of 31140044022 is 22044004113.

It is a self number, because there is not a number n which added to its sum of digits gives 31140044022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140044021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9233203 + ... + 9236574.

It is an arithmetic number, because the mean of its divisors is an integer number (3906358047).

Almost surely, 2^31140044022 is an apocalyptic number.

31140044022 is an abundant number, since it is smaller than the sum of its proper divisors (31361684730).

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

31140044022 is a wasteful number, since it uses less digits than its factorization.

31140044022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18470063.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 31140044022 its reverse (22044004113), we get a palindrome (53184048135).

The spelling of 31140044022 in words is "thirty-one billion, one hundred forty million, forty-four thousand, twenty-two".