31031313200000 has 96 divisors (see below), whose sum is σ = 77270298212520. Its totient is φ = 12412525120000.

The previous prime is 31031313199993. The next prime is 31031313200009. The reversal of 31031313200000 is 231313013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031313200009) by changing a digit.

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, 38389142 + ... + 39189141.

Almost surely, 2^{31031313200000} is an apocalyptic number.

It is an amenable number.

31031313200000 is an abundant number, since it is smaller than the sum of its proper divisors (46238985012520).

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

31031313200000 is an frugal number, since it uses more digits than its factorization.

31031313200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77578322 (or 77578290 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31031313200000 its reverse (231313013), we get a palindrome (31031544513013).

The spelling of 31031313200000 in words is "thirty-one trillion, thirty-one billion, three hundred thirteen million, two hundred thousand".