213211013 has 4 divisors (see below), whose sum is σ = 214095948. Its totient is φ = 212326080.

The previous prime is 213211007. The next prime is 213211021. The reversal of 213211013 is 310112312.

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 188430529 + 24780484 = 13727^2 + 4978^2 .

It is a cyclic number.

It is not a de Polignac number, because 213211013 - 2¹⁰ = 213209989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213211213) 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, 442106 + ... + 442587.

It is an arithmetic number, because the mean of its divisors is an integer number (53523987).

Almost surely, 2^213211013 is an apocalyptic number.

It is an amenable number.

213211013 is a deficient number, since it is larger than the sum of its proper divisors (884935).

213211013 is an equidigital number, since it uses as much as digits as its factorization.

213211013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884934.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 213211013 is about 14601.7469160371. The cubic root of 213211013 is about 597.4064095984.

Adding to 213211013 its reverse (310112312), we get a palindrome (523323325).

The spelling of 213211013 in words is "two hundred thirteen million, two hundred eleven thousand, thirteen".