213420211 has 4 divisors (see below), whose sum is σ = 218625624. Its totient is φ = 208214800.

The previous prime is 213420203. The next prime is 213420257. The reversal of 213420211 is 112024312.

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 213420211 - 2³ = 213420203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213420271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2602645 + ... + 2602726.

It is an arithmetic number, because the mean of its divisors is an integer number (54656406).

Almost surely, 2^213420211 is an apocalyptic number.

213420211 is a deficient number, since it is larger than the sum of its proper divisors (5205413).

213420211 is an equidigital number, since it uses as much as digits as its factorization.

213420211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5205412.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 213420211 is about 14608.9086176894. The cubic root of 213420211 is about 597.6017331137.

Adding to 213420211 its reverse (112024312), we get a palindrome (325444523).

The spelling of 213420211 in words is "two hundred thirteen million, four hundred twenty thousand, two hundred eleven".