31305212000 has 48 divisors (see below), whose sum is σ = 76916915712. Its totient is φ = 12522083200.

The previous prime is 31305211997. The next prime is 31305212077. The reversal of 31305212000 is 21250313.

It is a self number, because there is not a number n which added to its sum of digits gives 31305212000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3909152 + ... + 3917151.

It is an arithmetic number, because the mean of its divisors is an integer number (1602435744).

Almost surely, 2^31305212000 is an apocalyptic number.

It is an amenable number.

31305212000 is an abundant number, since it is smaller than the sum of its proper divisors (45611703712).

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

31305212000 is an equidigital number, since it uses as much as digits as its factorization.

31305212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7826328 (or 7826310 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 31305212000 its reverse (21250313), we get a palindrome (31326462313).

The spelling of 31305212000 in words is "thirty-one billion, three hundred five million, two hundred twelve thousand".