31213002200 has 48 divisors (see below), whose sum is σ = 72946331880. Its totient is φ = 12420495360.

The previous prime is 31213002199. The next prime is 31213002203. The reversal of 31213002200 is 220031213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213002203) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 365714 + ... + 442913.

Almost surely, 2^31213002200 is an apocalyptic number.

It is an amenable number.

31213002200 is an abundant number, since it is smaller than the sum of its proper divisors (41733329680).

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

31213002200 is a wasteful number, since it uses less digits than its factorization.

31213002200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808836 (or 808827 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31213002200 its reverse (220031213), we get a palindrome (31433033413).

The spelling of 31213002200 in words is "thirty-one billion, two hundred thirteen million, two thousand, two hundred".