31304200000 has 84 divisors (see below), whose sum is σ = 77644616364. Its totient is φ = 12521600000.

The previous prime is 31304199991. The next prime is 31304200001. The reversal of 31304200000 is 240313.

It can be written as a sum of positive squares in 6 ways, for example, as 26080958016 + 5223241984 = 161496^2 + 72272^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31304200001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121740 + ... + 278260.

It is an arithmetic number, because the mean of its divisors is an integer number (924340671).

Almost surely, 2^31304200000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31304200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38822308182).

31304200000 is an abundant number, since it is smaller than the sum of its proper divisors (46340416364).

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

31304200000 is an frugal number, since it uses more digits than its factorization.

31304200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156558 (or 156528 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 31304200000 its reverse (240313), we get a palindrome (31304440313).

The spelling of 31304200000 in words is "thirty-one billion, three hundred four million, two hundred thousand".