202321213 has 2 divisors, whose sum is σ = 202321214. Its totient is φ = 202321212.

The previous prime is 202321211. The next prime is 202321219. The reversal of 202321213 is 312123202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199317924 + 3003289 = 14118^2 + 1733^2 .

It is a cyclic number.

It is not a de Polignac number, because 202321213 - 2¹ = 202321211 is a prime.

Together with 202321211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202321211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101160606 + 101160607.

It is an arithmetic number, because the mean of its divisors is an integer number (101160607).

Almost surely, 2^202321213 is an apocalyptic number.

It is an amenable number.

202321213 is a deficient number, since it is larger than the sum of its proper divisors (1).

202321213 is an equidigital number, since it uses as much as digits as its factorization.

202321213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 202321213 is about 14223.9661487224. The cubic root of 202321213 is about 587.0572736987.

Adding to 202321213 its reverse (312123202), we get a palindrome (514444415).

The spelling of 202321213 in words is "two hundred two million, three hundred twenty-one thousand, two hundred thirteen".