211313220 has 48 divisors (see below), whose sum is σ = 601715520. Its totient is φ = 55394176.

The previous prime is 211313209. The next prime is 211313257. The reversal of 211313220 is 22313112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211313220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26307 + ... + 33386.

It is an arithmetic number, because the mean of its divisors is an integer number (12535740).

Almost surely, 2^211313220 is an apocalyptic number.

211313220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211313220 is an abundant number, since it is smaller than the sum of its proper divisors (390402300).

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

211313220 is a wasteful number, since it uses less digits than its factorization.

211313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59764 (or 59762 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 211313220 is about 14536.6165251753. The cubic root of 211313220 is about 595.6286179320.

Adding to 211313220 its reverse (22313112), we get a palindrome (233626332).

The spelling of 211313220 in words is "two hundred eleven million, three hundred thirteen thousand, two hundred twenty".