211033220 has 12 divisors (see below), whose sum is σ = 443169804. Its totient is φ = 84413280.

The previous prime is 211033201. The next prime is 211033241. The reversal of 211033220 is 22330112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 152571904 + 58461316 = 12352^2 + 7646^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211033195 and 211033204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5275811 + ... + 5275850.

It is an arithmetic number, because the mean of its divisors is an integer number (36930817).

Almost surely, 2^211033220 is an apocalyptic number.

211033220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211033220 is an abundant number, since it is smaller than the sum of its proper divisors (232136584).

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

211033220 is a wasteful number, since it uses less digits than its factorization.

211033220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10551670 (or 10551668 counting only the distinct ones).

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

The square root of 211033220 is about 14526.9824808871. The cubic root of 211033220 is about 595.3654229627.

Adding to 211033220 its reverse (22330112), we get a palindrome (233363332).

The spelling of 211033220 in words is "two hundred eleven million, thirty-three thousand, two hundred twenty".