213399911 has 4 divisors (see below), whose sum is σ = 222678192. Its totient is φ = 204121632.

The previous prime is 213399883. The next prime is 213399913. The reversal of 213399911 is 119993312.

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

It is a cyclic number.

It is not a de Polignac number, because 213399911 - 2⁶ = 213399847 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 (213399913) 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, 4639106 + ... + 4639151.

It is an arithmetic number, because the mean of its divisors is an integer number (55669548).

Almost surely, 2^213399911 is an apocalyptic number.

213399911 is a deficient number, since it is larger than the sum of its proper divisors (9278281).

213399911 is an equidigital number, since it uses as much as digits as its factorization.

213399911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9278280.

The product of its digits is 13122, while the sum is 38.

The square root of 213399911 is about 14608.2138196290. The cubic root of 213399911 is about 597.5827850491.

The spelling of 213399911 in words is "two hundred thirteen million, three hundred ninety-nine thousand, nine hundred eleven".