213131002002 has 64 divisors (see below), whose sum is σ = 461339504640. Its totient is φ = 65420265600.

The previous prime is 213131001973. The next prime is 213131002009. The reversal of 213131002002 is 200200131312.

It is not an unprimeable number, because it can be changed into a prime (213131002009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1182523 + ... + 1350785.

It is an arithmetic number, because the mean of its divisors is an integer number (7208429760).

Almost surely, 2^213131002002 is an apocalyptic number.

213131002002 is an abundant number, since it is smaller than the sum of its proper divisors (248208502638).

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

213131002002 is a wasteful number, since it uses less digits than its factorization.

213131002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168599.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 213131002002 its reverse (200200131312), we get a palindrome (413331133314).

The spelling of 213131002002 in words is "two hundred thirteen billion, one hundred thirty-one million, two thousand, two".