211305323 has 4 divisors (see below), whose sum is σ = 212704848. Its totient is φ = 209905800.

The previous prime is 211305307. The next prime is 211305371. The reversal of 211305323 is 323503112.

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 211305323 - 2⁴ = 211305307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211305295 and 211305304.

It is not an unprimeable number, because it can be changed into a prime (211305823) 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, 699536 + ... + 699837.

It is an arithmetic number, because the mean of its divisors is an integer number (53176212).

Almost surely, 2^211305323 is an apocalyptic number.

211305323 is a deficient number, since it is larger than the sum of its proper divisors (1399525).

211305323 is a wasteful number, since it uses less digits than its factorization.

211305323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399524.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 211305323 is about 14536.3448982198. The cubic root of 211305323 is about 595.6211980810.

Adding to 211305323 its reverse (323503112), we get a palindrome (534808435).

The spelling of 211305323 in words is "two hundred eleven million, three hundred five thousand, three hundred twenty-three".