31440323422000 has 40 divisors (see below), whose sum is σ = 76022702039232. Its totient is φ = 12576129368000.

The previous prime is 31440323421917. The next prime is 31440323422007. The reversal of 31440323422000 is 22432304413.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 31440323422000.

It is not an unprimeable number, because it can be changed into a prime (31440323422007) 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, 7860078856 + ... + 7860082855.

Almost surely, 2^{31440323422000} is an apocalyptic number.

It is an amenable number.

31440323422000 is an abundant number, since it is smaller than the sum of its proper divisors (44582378617232).

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

31440323422000 is a wasteful number, since it uses less digits than its factorization.

31440323422000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15720161734 (or 15720161718 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 31440323422000 its reverse (22432304413), we get a palindrome (31462755726413).

The spelling of 31440323422000 in words is "thirty-one trillion, four hundred forty billion, three hundred twenty-three million, four hundred twenty-two thousand".