31130331330 has 64 divisors (see below), whose sum is σ = 86169473280. Its totient is φ = 7050219264.

The previous prime is 31130331319. The next prime is 31130331373. The reversal of 31130331330 is 3313303113.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 31130331297 and 31130331306.

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 31 ways as a sum of consecutive naturals, for example, 657109 + ... + 702888.

It is an arithmetic number, because the mean of its divisors is an integer number (1346398020).

Almost surely, 2^31130331330 is an apocalyptic number.

31130331330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31130331330 is an abundant number, since it is smaller than the sum of its proper divisors (55039141950).

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

31130331330 is a wasteful number, since it uses less digits than its factorization.

31130331330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360123.

The product of its (nonzero) digits is 729, while the sum is 21.

Adding to 31130331330 its reverse (3313303113), we get a palindrome (34443634443).

The spelling of 31130331330 in words is "thirty-one billion, one hundred thirty million, three hundred thirty-one thousand, three hundred thirty".