31343220200 has 48 divisors (see below), whose sum is σ = 72935763360. Its totient is φ = 12526488000.

The previous prime is 31343220191. The next prime is 31343220203. The reversal of 31343220200 is 202234313.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (31343220203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167285 + ... + 301115.

It is an arithmetic number, because the mean of its divisors is an integer number (1519495070).

Almost surely, 2^31343220200 is an apocalyptic number.

It is an amenable number.

31343220200 is an abundant number, since it is smaller than the sum of its proper divisors (41592543160).

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

31343220200 is a wasteful number, since it uses less digits than its factorization.

31343220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135018 (or 135009 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 31343220200 its reverse (202234313), we get a palindrome (31545454513).

The spelling of 31343220200 in words is "thirty-one billion, three hundred forty-three million, two hundred twenty thousand, two hundred".