211134220 has 48 divisors (see below), whose sum is σ = 512150688. Its totient is φ = 72258560.

The previous prime is 211134197. The next prime is 211134221. The reversal of 211134220 is 22431112.

It is a junction number, because it is equal to n+sod(n) for n = 211134194 and 211134203.

It is not an unprimeable number, because it can be changed into a prime (211134221) 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 15 ways as a sum of consecutive naturals, for example, 24487 + ... + 31966.

It is an arithmetic number, because the mean of its divisors is an integer number (10669806).

Almost surely, 2^211134220 is an apocalyptic number.

211134220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211134220 is an abundant number, since it is smaller than the sum of its proper divisors (301016468).

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

211134220 is a wasteful number, since it uses less digits than its factorization.

211134220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56490 (or 56488 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 211134220 is about 14530.4583547801. The cubic root of 211134220 is about 595.4603879754.

Adding to 211134220 its reverse (22431112), we get a palindrome (233565332).

It can be divided in two parts, 211 and 134220, that added together give a palindrome (134431).

The spelling of 211134220 in words is "two hundred eleven million, one hundred thirty-four thousand, two hundred twenty".