31304430322400 has 72 divisors (see below), whose sum is σ = 76848879091320. Its totient is φ = 12451818037760.

The previous prime is 31304430322381. The next prime is 31304430322421. The reversal of 31304430322400 is 422303440313.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 109159979 + ... + 109446378.

It is an arithmetic number, because the mean of its divisors is an integer number (1067345542935).

Almost surely, 2^{31304430322400} is an apocalyptic number.

It is an amenable number.

31304430322400 is an abundant number, since it is smaller than the sum of its proper divisors (45544448768920).

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

31304430322400 is a wasteful number, since it uses less digits than its factorization.

31304430322400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218606556 (or 218606543 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 31304430322400 its reverse (422303440313), we get a palindrome (31726733762713).

The spelling of 31304430322400 in words is "thirty-one trillion, three hundred four billion, four hundred thirty million, three hundred twenty-two thousand, four hundred".