31031012330 has 16 divisors (see below), whose sum is σ = 55859072040. Its totient is φ = 12411682752.

The previous prime is 31031012297. The next prime is 31031012351. The reversal of 31031012330 is 3321013013.

It can be written as a sum of positive squares in 4 ways, for example, as 15158288161 + 15872724169 = 123119^2 + 125987^2 .

It is a super-2 number, since 2×31031012330² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31031012299 and 31031012308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111716 + ... + 273024.

Almost surely, 2^31031012330 is an apocalyptic number.

31031012330 is a deficient number, since it is larger than the sum of its proper divisors (24828059710).

31031012330 is a wasteful number, since it uses less digits than its factorization.

31031012330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180553.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31031012330 its reverse (3321013013), we get a palindrome (34352025343).

The spelling of 31031012330 in words is "thirty-one billion, thirty-one million, twelve thousand, three hundred thirty".