213303021 has 8 divisors (see below), whose sum is σ = 285878400. Its totient is φ = 141464832.

The previous prime is 213303017. The next prime is 213303049. The reversal of 213303021 is 120303312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213303021 - 2² = 213303017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213303001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183621 + ... + 184778.

It is an arithmetic number, because the mean of its divisors is an integer number (35734800).

Almost surely, 2^213303021 is an apocalyptic number.

It is an amenable number.

213303021 is a deficient number, since it is larger than the sum of its proper divisors (72575379).

213303021 is a wasteful number, since it uses less digits than its factorization.

213303021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368595.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 213303021 is about 14604.8971581453. The cubic root of 213303021 is about 597.4923311516.

Adding to 213303021 its reverse (120303312), we get a palindrome (333606333).

The spelling of 213303021 in words is "two hundred thirteen million, three hundred three thousand, twenty-one".