211030223 has 4 divisors (see below), whose sum is σ = 211090488. Its totient is φ = 210969960.

The previous prime is 211030219. The next prime is 211030229. The reversal of 211030223 is 322030112.

It is a happy number.

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 211030223 - 2² = 211030219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211030198 and 211030207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211030229) 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, 24533 + ... + 31998.

It is an arithmetic number, because the mean of its divisors is an integer number (52772622).

Almost surely, 2^211030223 is an apocalyptic number.

211030223 is a deficient number, since it is larger than the sum of its proper divisors (60265).

211030223 is an equidigital number, since it uses as much as digits as its factorization.

211030223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60264.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 211030223 is about 14526.8793276464. The cubic root of 211030223 is about 595.3626045777.

Adding to 211030223 its reverse (322030112), we get a palindrome (533060335).

The spelling of 211030223 in words is "two hundred eleven million, thirty thousand, two hundred twenty-three".