213321303 has 64 divisors (see below), whose sum is σ = 370944000. Its totient is φ = 119968128.

The previous prime is 213321289. The next prime is 213321307. The reversal of 213321303 is 303123312.

It is not a de Polignac number, because 213321303 - 2⁶ = 213321239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213321307) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 192850 + ... + 193952.

It is an arithmetic number, because the mean of its divisors is an integer number (5796000).

Almost surely, 2^213321303 is an apocalyptic number.

213321303 is a deficient number, since it is larger than the sum of its proper divisors (157622697).

213321303 is a wasteful number, since it uses less digits than its factorization.

213321303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173 (or 1167 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 213321303 is about 14605.5230306895. The cubic root of 213321303 is about 597.5094008313.

Adding to 213321303 its reverse (303123312), we get a palindrome (516444615).

It can be divided in two parts, 2133 and 21303, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 213321303 in words is "two hundred thirteen million, three hundred twenty-one thousand, three hundred three".