213335321 has 4 divisors (see below), whose sum is σ = 213419700. Its totient is φ = 213250944.

The previous prime is 213335293. The next prime is 213335323. The reversal of 213335321 is 123533312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63027721 + 150307600 = 7939^2 + 12260^2 .

It is a cyclic number.

It is not a de Polignac number, because 213335321 - 2⁶ = 213335257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213335323) 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, 38276 + ... + 43493.

It is an arithmetic number, because the mean of its divisors is an integer number (53354925).

Almost surely, 2^213335321 is an apocalyptic number.

It is an amenable number.

213335321 is a deficient number, since it is larger than the sum of its proper divisors (84379).

213335321 is an equidigital number, since it uses as much as digits as its factorization.

213335321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84378.

The product of its digits is 1620, while the sum is 23.

The square root of 213335321 is about 14606.0029097628. The cubic root of 213335321 is about 597.5224886058.

Adding to 213335321 its reverse (123533312), we get a palindrome (336868633).

The spelling of 213335321 in words is "two hundred thirteen million, three hundred thirty-five thousand, three hundred twenty-one".