211023223 has 4 divisors (see below), whose sum is σ = 212318008. Its totient is φ = 209728440.

The previous prime is 211023221. The next prime is 211023233. The reversal of 211023223 is 322320112.

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 211023223 - 2¹ = 211023221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211023197 and 211023206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211023221) 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, 647148 + ... + 647473.

It is an arithmetic number, because the mean of its divisors is an integer number (53079502).

Almost surely, 2^211023223 is an apocalyptic number.

211023223 is a deficient number, since it is larger than the sum of its proper divisors (1294785).

211023223 is a wasteful number, since it uses less digits than its factorization.

211023223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294784.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 211023223 is about 14526.6383929662. The cubic root of 211023223 is about 595.3560216591.

Adding to 211023223 its reverse (322320112), we get a palindrome (533343335).

The spelling of 211023223 in words is "two hundred eleven million, twenty-three thousand, two hundred twenty-three".