31133330220 has 96 divisors (see below), whose sum is σ = 87744384000. Its totient is φ = 8248006144.

The previous prime is 31133330159. The next prime is 31133330233. The reversal of 31133330220 is 2203333113.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6694456 + ... + 6699104.

It is an arithmetic number, because the mean of its divisors is an integer number (914004000).

Almost surely, 2^31133330220 is an apocalyptic number.

31133330220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31133330220 is an abundant number, since it is smaller than the sum of its proper divisors (56611053780).

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

31133330220 is a wasteful number, since it uses less digits than its factorization.

31133330220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5367 (or 5365 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31133330220 its reverse (2203333113), we get a palindrome (33336663333).

It can be divided in two parts, 3113 and 3330220, that added together give a palindrome (3333333).

The spelling of 31133330220 in words is "thirty-one billion, one hundred thirty-three million, three hundred thirty thousand, two hundred twenty".