31400440122320 has 40 divisors (see below), whose sum is σ = 76848445566240. Its totient is φ = 11899114151040.

The previous prime is 31400440122313. The next prime is 31400440122323. The reversal of 31400440122320 is 2322104400413.

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 31400440122320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31400440122323) 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, 10329090626 + ... + 10329093665.

It is an arithmetic number, because the mean of its divisors is an integer number (1921211139156).

Almost surely, 2^{31400440122320} is an apocalyptic number.

It is an amenable number.

31400440122320 is an abundant number, since it is smaller than the sum of its proper divisors (45448005443920).

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

31400440122320 is a wasteful number, since it uses less digits than its factorization.

31400440122320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20658184323 (or 20658184317 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 31400440122320 its reverse (2322104400413), we get a palindrome (33722544522733).

The spelling of 31400440122320 in words is "thirty-one trillion, four hundred billion, four hundred forty million, one hundred twenty-two thousand, three hundred twenty".