211423230 has 64 divisors (see below), whose sum is σ = 565081920. Its totient is φ = 56251008.

The previous prime is 211423229. The next prime is 211423243. The reversal of 211423230 is 32324112.

211423230 is a `hidden beast` number, since 2 + 11 + 423 + 230 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208204 + ... + 209216.

It is an arithmetic number, because the mean of its divisors is an integer number (8829405).

Almost surely, 2^211423230 is an apocalyptic number.

211423230 is an abundant number, since it is smaller than the sum of its proper divisors (353658690).

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

211423230 is a wasteful number, since it uses less digits than its factorization.

211423230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802 (or 1796 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 211423230 is about 14540.3999257242. The cubic root of 211423230 is about 595.7319617372.

Adding to 211423230 its reverse (32324112), we get a palindrome (243747342).

The spelling of 211423230 in words is "two hundred eleven million, four hundred twenty-three thousand, two hundred thirty".