211342220 has 12 divisors (see below), whose sum is σ = 443818704. Its totient is φ = 84536880.

The previous prime is 211342211. The next prime is 211342231. The reversal of 211342220 is 22243112.

It is a super-3 number, since 3×211342220³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5283536 + ... + 5283575.

It is an arithmetic number, because the mean of its divisors is an integer number (36984892).

Almost surely, 2^211342220 is an apocalyptic number.

211342220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211342220 is an abundant number, since it is smaller than the sum of its proper divisors (232476484).

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

211342220 is a wasteful number, since it uses less digits than its factorization.

211342220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10567120 (or 10567118 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 211342220 is about 14537.6139720382. The cubic root of 211342220 is about 595.6558641210.

Adding to 211342220 its reverse (22243112), we get a palindrome (233585332).

The spelling of 211342220 in words is "two hundred eleven million, three hundred forty-two thousand, two hundred twenty".