213431204 has 24 divisors (see below), whose sum is σ = 429985920. Its totient is φ = 90801216.

The previous prime is 213431171. The next prime is 213431233. The reversal of 213431204 is 402134312.

213431204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23984 + ... + 31655.

It is an arithmetic number, because the mean of its divisors is an integer number (17916080).

Almost surely, 2^213431204 is an apocalyptic number.

It is an amenable number.

213431204 is an abundant number, since it is smaller than the sum of its proper divisors (216554716).

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

213431204 is a wasteful number, since it uses less digits than its factorization.

213431204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55787 (or 55785 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 213431204 is about 14609.2848558716. The cubic root of 213431204 is about 597.6119935025.

Adding to 213431204 its reverse (402134312), we get a palindrome (615565516).

The spelling of 213431204 in words is "two hundred thirteen million, four hundred thirty-one thousand, two hundred four".