211205323 has 4 divisors (see below), whose sum is σ = 241377520. Its totient is φ = 181033128.

The previous prime is 211205261. The next prime is 211205341. The reversal of 211205323 is 323502112.

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 211205323 - 2¹³ = 211197131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211205323.

It is not an unprimeable number, because it can be changed into a prime (211205353) 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, 15086088 + ... + 15086101.

It is an arithmetic number, because the mean of its divisors is an integer number (60344380).

Almost surely, 2^211205323 is an apocalyptic number.

211205323 is a deficient number, since it is larger than the sum of its proper divisors (30172197).

211205323 is an equidigital number, since it uses as much as digits as its factorization.

211205323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30172196.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 211205323 is about 14532.9048369553. The cubic root of 211205323 is about 595.5272242405.

Adding to 211205323 its reverse (323502112), we get a palindrome (534707435).

The spelling of 211205323 in words is "two hundred eleven million, two hundred five thousand, three hundred twenty-three".