31300221200 has 60 divisors (see below), whose sum is σ = 75343618548. Its totient is φ = 12495974400.

The previous prime is 31300221181. The next prime is 31300221223. The reversal of 31300221200 is 212200313.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 5341855744 + 25958365456 = 73088^2 + 161116^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133304 + ... + 283496.

Almost surely, 2^31300221200 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 31300221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37671809274).

31300221200 is an abundant number, since it is smaller than the sum of its proper divisors (44043397348).

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

31300221200 is a wasteful number, since it uses less digits than its factorization.

31300221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150732 (or 150721 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31300221200 its reverse (212200313), we get a palindrome (31512421513).

The spelling of 31300221200 in words is "thirty-one billion, three hundred million, two hundred twenty-one thousand, two hundred".