31330032100 has 36 divisors (see below), whose sum is σ = 68361823348. Its totient is φ = 12462768000.

The previous prime is 31330032091. The next prime is 31330032103. The reversal of 31330032100 is 123003313.

It can be written as a sum of positive squares in 6 ways, for example, as 6450017344 + 24880014756 = 80312^2 + 157734^2 .

It is a super-2 number, since 2×31330032100² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31330032103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 847371 + ... + 883570.

Almost surely, 2^31330032100 is an apocalyptic number.

It is an amenable number.

31330032100 is an abundant number, since it is smaller than the sum of its proper divisors (37031791248).

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

31330032100 is a wasteful number, since it uses less digits than its factorization.

31330032100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731136 (or 1731129 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 31330032100 its reverse (123003313), we get a palindrome (31453035413).

The spelling of 31330032100 in words is "thirty-one billion, three hundred thirty million, thirty-two thousand, one hundred".