211233872 has 10 divisors (see below), whose sum is σ = 409265658. Its totient is φ = 105616928.

The previous prime is 211233833. The next prime is 211233877. The reversal of 211233872 is 278332112.

It can be written as a sum of positive squares in only one way, i.e., 210946576 + 287296 = 14524^2 + 536^2 .

It is a super-2 number, since 2×211233872² = 89239497360224768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211233877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6601043 + ... + 6601074.

Almost surely, 2^211233872 is an apocalyptic number.

It is an amenable number.

211233872 is a deficient number, since it is larger than the sum of its proper divisors (198031786).

211233872 is a wasteful number, since it uses less digits than its factorization.

211233872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13202125 (or 13202119 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 211233872 is about 14533.8870230919. The cubic root of 211233872 is about 595.5540558571.

Adding to 211233872 its reverse (278332112), we get a palindrome (489565984).

The spelling of 211233872 in words is "two hundred eleven million, two hundred thirty-three thousand, eight hundred seventy-two".