213229911 has 4 divisors (see below), whose sum is σ = 284306552. Its totient is φ = 142153272.

The previous prime is 213229909. The next prime is 213229943. The reversal of 213229911 is 119922312.

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

It is not a de Polignac number, because 213229911 - 2¹ = 213229909 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 (213229901) 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, 35538316 + ... + 35538321.

It is an arithmetic number, because the mean of its divisors is an integer number (71076638).

Almost surely, 2^213229911 is an apocalyptic number.

213229911 is a deficient number, since it is larger than the sum of its proper divisors (71076641).

213229911 is an equidigital number, since it uses as much as digits as its factorization.

213229911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71076640.

The product of its digits is 1944, while the sum is 30.

The square root of 213229911 is about 14602.3940160509. The cubic root of 213229911 is about 597.4240594884.

The spelling of 213229911 in words is "two hundred thirteen million, two hundred twenty-nine thousand, nine hundred eleven".