213202013 has 4 divisors (see below), whose sum is σ = 213550428. Its totient is φ = 212853600.

The previous prime is 213202001. The next prime is 213202027. The reversal of 213202013 is 310202312.

It is a happy number.

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 2748964 + 210453049 = 1658^2 + 14507^2 .

It is a cyclic number.

It is not a de Polignac number, because 213202013 - 2⁶ = 213201949 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 (213202043) 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, 173288 + ... + 174513.

It is an arithmetic number, because the mean of its divisors is an integer number (53387607).

Almost surely, 2^213202013 is an apocalyptic number.

It is an amenable number.

213202013 is a deficient number, since it is larger than the sum of its proper divisors (348415).

213202013 is an equidigital number, since it uses as much as digits as its factorization.

213202013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348414.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 213202013 is about 14601.4387304813. The cubic root of 213202013 is about 597.3980036327.

Adding to 213202013 its reverse (310202312), we get a palindrome (523404325).

The spelling of 213202013 in words is "two hundred thirteen million, two hundred two thousand, thirteen".