210442213 has 4 divisors (see below), whose sum is σ = 210629740. Its totient is φ = 210254688.

The previous prime is 210442189. The next prime is 210442231. The reversal of 210442213 is 312244012.

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 28111204 + 182331009 = 5302^2 + 13503^2 .

It is a cyclic number.

It is not a de Polignac number, because 210442213 - 2⁵ = 210442181 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 (210442313) 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, 92070 + ... + 94327.

It is an arithmetic number, because the mean of its divisors is an integer number (52657435).

Almost surely, 2^210442213 is an apocalyptic number.

It is an amenable number.

210442213 is a deficient number, since it is larger than the sum of its proper divisors (187527).

210442213 is a wasteful number, since it uses less digits than its factorization.

210442213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187526.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 210442213 is about 14506.6265203182. The cubic root of 210442213 is about 594.8091217394.

Adding to 210442213 its reverse (312244012), we get a palindrome (522686225).

The spelling of 210442213 in words is "two hundred ten million, four hundred forty-two thousand, two hundred thirteen".