31200200100 has 54 divisors (see below), whose sum is σ = 97795296690. Its totient is φ = 8320053120.

The previous prime is 31200200081. The next prime is 31200200137. The reversal of 31200200100 is 100200213.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1623767616 + 29576432484 = 40296^2 + 171978^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

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 17 ways as a sum of consecutive naturals, for example, 17332545 + ... + 17334344.

Almost surely, 2^31200200100 is an apocalyptic number.

31200200100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31200200100 is an abundant number, since it is smaller than the sum of its proper divisors (66595096590).

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

31200200100 is a wasteful number, since it uses less digits than its factorization.

31200200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34666909 (or 34666899 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 31200200100 its reverse (100200213), we get a palindrome (31300400313).

The spelling of 31200200100 in words is "thirty-one billion, two hundred million, two hundred thousand, one hundred".