31031430304 has 72 divisors (see below), whose sum is σ = 71153898228. Its totient is φ = 13283020800.

The previous prime is 31031430293. The next prime is 31031430319. The reversal of 31031430304 is 40303413013.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31028117904 + 3312400 = 176148^2 + 1820^2 .

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, 1325904 + ... + 1349104.

Almost surely, 2^31031430304 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 31031430304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35576949114).

31031430304 is an abundant number, since it is smaller than the sum of its proper divisors (40122467924).

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

31031430304 is a wasteful number, since it uses less digits than its factorization.

31031430304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24078 (or 24063 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31031430304 its reverse (40303413013), we get a palindrome (71334843317).

The spelling of 31031430304 in words is "thirty-one billion, thirty-one million, four hundred thirty thousand, three hundred four".