31131011330 has 16 divisors (see below), whose sum is σ = 56803435704. Its totient is φ = 12281823360.

The previous prime is 31131011323. The next prime is 31131011347. The reversal of 31131011330 is 3311013113.

It can be written as a sum of positive squares in 4 ways, for example, as 25546587889 + 5584423441 = 159833^2 + 74729^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31131011299 and 31131011308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21321881 + ... + 21323340.

Almost surely, 2^31131011330 is an apocalyptic number.

31131011330 is a deficient number, since it is larger than the sum of its proper divisors (25672424374).

31131011330 is a wasteful number, since it uses less digits than its factorization.

31131011330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42645301.

The product of its (nonzero) digits is 81, while the sum is 17.

Adding to 31131011330 its reverse (3311013113), we get a palindrome (34442024443).

The spelling of 31131011330 in words is "thirty-one billion, one hundred thirty-one million, eleven thousand, three hundred thirty".