213201311 has 4 divisors (see below), whose sum is σ = 213816072. Its totient is φ = 212586552.

The previous prime is 213201293. The next prime is 213201341. The reversal of 213201311 is 113102312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213201311 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 (213201341) 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, 306860 + ... + 307553.

It is an arithmetic number, because the mean of its divisors is an integer number (53454018).

Almost surely, 2^213201311 is an apocalyptic number.

213201311 is a deficient number, since it is larger than the sum of its proper divisors (614761).

213201311 is an equidigital number, since it uses as much as digits as its factorization.

213201311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614760.

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

The square root of 213201311 is about 14601.4146917345. The cubic root of 213201311 is about 597.3973479575.

Adding to 213201311 its reverse (113102312), we get a palindrome (326303623).

The spelling of 213201311 in words is "two hundred thirteen million, two hundred one thousand, three hundred eleven".