31730296900 has 81 divisors (see below), whose sum is σ = 70537021149. Its totient is φ = 12389297760.

The previous prime is 31730296879. The next prime is 31730296931. The reversal of 31730296900 is 969203713.

The square root of 31730296900 is 178130.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11422906884 + 20307390016 = 106878^2 + 142504^2 .

It is a super-2 number, since 2×31730296900² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 83720911 + ... + 83721289.

Almost surely, 2^31730296900 is an apocalyptic number.

31730296900 is the 178130-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31730296900

31730296900 is an abundant number, since it is smaller than the sum of its proper divisors (38806724249).

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

31730296900 is an equidigital number, since it uses as much as digits as its factorization.

31730296900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 40.

The spelling of 31730296900 in words is "thirty-one billion, seven hundred thirty million, two hundred ninety-six thousand, nine hundred".