211203234 has 64 divisors (see below), whose sum is σ = 516948480. Its totient is φ = 63383760.

The previous prime is 211203233. The next prime is 211203269. The reversal of 211203234 is 432302112.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211203233) 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 31 ways as a sum of consecutive naturals, for example, 61897 + ... + 65219.

It is an arithmetic number, because the mean of its divisors is an integer number (8077320).

Almost surely, 2^211203234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211203234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258474240).

211203234 is an abundant number, since it is smaller than the sum of its proper divisors (305745246).

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

211203234 is a wasteful number, since it uses less digits than its factorization.

211203234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452 (or 3446 counting only the distinct ones).

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

The square root of 211203234 is about 14532.8329653925. The cubic root of 211203234 is about 595.5252608107.

Adding to 211203234 its reverse (432302112), we get a palindrome (643505346).

The spelling of 211203234 in words is "two hundred eleven million, two hundred three thousand, two hundred thirty-four".