211304420 has 12 divisors (see below), whose sum is σ = 443739324. Its totient is φ = 84521760.

The previous prime is 211304419. The next prime is 211304477. The reversal of 211304420 is 24403112.

It can be written as a sum of positive squares in 2 ways, for example, as 139665124 + 71639296 = 11818^2 + 8464^2 .

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, 5282591 + ... + 5282630.

It is an arithmetic number, because the mean of its divisors is an integer number (36978277).

Almost surely, 2^211304420 is an apocalyptic number.

211304420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211304420 is an abundant number, since it is smaller than the sum of its proper divisors (232434904).

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

211304420 is a wasteful number, since it uses less digits than its factorization.

211304420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10565230 (or 10565228 counting only the distinct ones).

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

The square root of 211304420 is about 14536.3138381090. The cubic root of 211304420 is about 595.6203496299.

Adding to 211304420 its reverse (24403112), we get a palindrome (235707532).

The spelling of 211304420 in words is "two hundred eleven million, three hundred four thousand, four hundred twenty".