211040218 has 16 divisors (see below), whose sum is σ = 323841024. Its totient is φ = 103118400.

The previous prime is 211040209. The next prime is 211040233. The reversal of 211040218 is 812040112.

It is a happy number.

It is a super-2 number, since 2×211040218² = 89075947226975048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211040195 and 211040204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10818 + ... + 23218.

It is an arithmetic number, because the mean of its divisors is an integer number (20240064).

Almost surely, 2^211040218 is an apocalyptic number.

211040218 is a deficient number, since it is larger than the sum of its proper divisors (112800806).

211040218 is a wasteful number, since it uses less digits than its factorization.

211040218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12597.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 211040218 is about 14527.2233410243. The cubic root of 211040218 is about 595.3720037926.

The spelling of 211040218 in words is "two hundred eleven million, forty thousand, two hundred eighteen".