213243404 has 12 divisors (see below), whose sum is σ = 407101128. Its totient is φ = 96928800.

The previous prime is 213243383. The next prime is 213243413. The reversal of 213243404 is 404342312.

213243404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 213243404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2423177 + ... + 2423264.

It is an arithmetic number, because the mean of its divisors is an integer number (33925094).

Almost surely, 2^213243404 is an apocalyptic number.

It is an amenable number.

213243404 is a deficient number, since it is larger than the sum of its proper divisors (193857724).

213243404 is a wasteful number, since it uses less digits than its factorization.

213243404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846456 (or 4846454 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 213243404 is about 14602.8560220253. The cubic root of 213243404 is about 597.4366607111.

Adding to 213243404 its reverse (404342312), we get a palindrome (617585716).

The spelling of 213243404 in words is "two hundred thirteen million, two hundred forty-three thousand, four hundred four".