213012304 has 10 divisors (see below), whose sum is σ = 412711370. Its totient is φ = 106506144.

The previous prime is 213012301. The next prime is 213012311. The reversal of 213012304 is 403210312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 183331600 + 29680704 = 13540^2 + 5448^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 13313269 = 213012304 / (2 + 1 + 3 + 0 + 1 + 2 + 3 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213012301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656619 + ... + 6656650.

It is an arithmetic number, because the mean of its divisors is an integer number (41271137).

Almost surely, 2^213012304 is an apocalyptic number.

It is an amenable number.

213012304 is a deficient number, since it is larger than the sum of its proper divisors (199699066).

213012304 is a wasteful number, since it uses less digits than its factorization.

213012304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13313277 (or 13313271 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 213012304 is about 14594.9410413335. The cubic root of 213012304 is about 597.2207610770.

Adding to 213012304 its reverse (403210312), we get a palindrome (616222616).

The spelling of 213012304 in words is "two hundred thirteen million, twelve thousand, three hundred four".