31440165222 has 16 divisors (see below), whose sum is σ = 66189821760. Its totient is φ = 9928473192.

The previous prime is 31440165179. The next prime is 31440165227. The reversal of 31440165222 is 22256104413.

It is a self number, because there is not a number n which added to its sum of digits gives 31440165222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440165227) 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, 137895348 + ... + 137895575.

It is an arithmetic number, because the mean of its divisors is an integer number (4136863860).

Almost surely, 2^31440165222 is an apocalyptic number.

31440165222 is an abundant number, since it is smaller than the sum of its proper divisors (34749656538).

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

31440165222 is a wasteful number, since it uses less digits than its factorization.

31440165222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275790947.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 31440165222 its reverse (22256104413), we get a palindrome (53696269635).

The spelling of 31440165222 in words is "thirty-one billion, four hundred forty million, one hundred sixty-five thousand, two hundred twenty-two".