213243303 has 16 divisors (see below), whose sum is σ = 349938176. Its totient is φ = 112479840.

The previous prime is 213243301. The next prime is 213243341. The reversal of 213243303 is 303342312.

It is not a de Polignac number, because 213243303 - 2¹ = 213243301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 213243303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213243301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390283 + ... + 390828.

It is an arithmetic number, because the mean of its divisors is an integer number (21871136).

Almost surely, 2^213243303 is an apocalyptic number.

213243303 is a deficient number, since it is larger than the sum of its proper divisors (136694873).

213243303 is a wasteful number, since it uses less digits than its factorization.

213243303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781134.

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 213243303 is about 14602.8525637973. The cubic root of 213243303 is about 597.4365663884.

Adding to 213243303 its reverse (303342312), we get a palindrome (516585615).

Subtracting 213243303 from its reverse (303342312), we obtain a palindrome (90099009).

The spelling of 213243303 in words is "two hundred thirteen million, two hundred forty-three thousand, three hundred three".