213403304 has 16 divisors (see below), whose sum is σ = 404094420. Its totient is φ = 105644800.

The previous prime is 213403303. The next prime is 213403321. The reversal of 213403304 is 403304312.

It can be written as a sum of positive squares in 2 ways, for example, as 213218404 + 184900 = 14602^2 + 430^2 .

It is not an unprimeable number, because it can be changed into a prime (213403303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131249 + ... + 132864.

Almost surely, 2^213403304 is an apocalyptic number.

It is an amenable number.

213403304 is a deficient number, since it is larger than the sum of its proper divisors (190691116).

213403304 is a wasteful number, since it uses less digits than its factorization.

213403304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264220 (or 264216 counting only the distinct ones).

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

The square root of 213403304 is about 14608.3299524621. The cubic root of 213403304 is about 597.5859521664.

Adding to 213403304 its reverse (403304312), we get a palindrome (616707616).

The spelling of 213403304 in words is "two hundred thirteen million, four hundred three thousand, three hundred four".