213143213 has 4 divisors (see below), whose sum is σ = 213235260. Its totient is φ = 213051168.

The previous prime is 213143209. The next prime is 213143219. The reversal of 213143213 is 312341312.

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 71961289 + 141181924 = 8483^2 + 11882^2 .

It is a cyclic number.

It is not a de Polignac number, because 213143213 - 2² = 213143209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213143219) 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, 42458 + ... + 47211.

It is an arithmetic number, because the mean of its divisors is an integer number (53308815).

Almost surely, 2^213143213 is an apocalyptic number.

It is an amenable number.

213143213 is a deficient number, since it is larger than the sum of its proper divisors (92047).

213143213 is an equidigital number, since it uses as much as digits as its factorization.

213143213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92046.

The product of its digits is 432, while the sum is 20.

The square root of 213143213 is about 14599.4250914206. The cubic root of 213143213 is about 597.3430788349.

Adding to 213143213 its reverse (312341312), we get a palindrome (525484525).

The spelling of 213143213 in words is "two hundred thirteen million, one hundred forty-three thousand, two hundred thirteen".