211223000 has 64 divisors (see below), whose sum is σ = 520322400. Its totient is φ = 80035200.

The previous prime is 211222997. The next prime is 211223039. The reversal of 211223000 is 322112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13442 + ... + 24558.

Almost surely, 2^211223000 is an apocalyptic number.

211223000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211223000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260161200).

211223000 is an abundant number, since it is smaller than the sum of its proper divisors (309099400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211223000 is a wasteful number, since it uses less digits than its factorization.

211223000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11157 (or 11143 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 211223000 is about 14533.5129958314. The cubic root of 211223000 is about 595.5438381542.

Adding to 211223000 its reverse (322112), we get a palindrome (211545112).

The spelling of 211223000 in words is "two hundred eleven million, two hundred twenty-three thousand".