31312210000 has 50 divisors (see below), whose sum is σ = 75810015842. Its totient is φ = 12524880000.

The previous prime is 31312209967. The next prime is 31312210003. The reversal of 31312210000 is 1221313.

It can be written as a sum of positive squares in 5 ways, for example, as 16431137856 + 14881072144 = 128184^2 + 121988^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312210003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1555611 + ... + 1575610.

Almost surely, 2^31312210000 is an apocalyptic number.

It is an amenable number.

31312210000 is an abundant number, since it is smaller than the sum of its proper divisors (44497805842).

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

31312210000 is an equidigital number, since it uses as much as digits as its factorization.

31312210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131249 (or 3131228 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31312210000 its reverse (1221313), we get a palindrome (31313431313).

The spelling of 31312210000 in words is "thirty-one billion, three hundred twelve million, two hundred ten thousand".