211912230 has 16 divisors (see below), whose sum is σ = 508589424. Its totient is φ = 56509920.

The previous prime is 211912229. The next prime is 211912243. The reversal of 211912230 is 32219112.

It is a junction number, because it is equal to n+sod(n) for n = 211912197 and 211912206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3531841 + ... + 3531900.

It is an arithmetic number, because the mean of its divisors is an integer number (31786839).

Almost surely, 2^211912230 is an apocalyptic number.

211912230 is an abundant number, since it is smaller than the sum of its proper divisors (296677194).

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

211912230 is a wasteful number, since it uses less digits than its factorization.

211912230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7063751.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 211912230 is about 14557.2054323624. The cubic root of 211912230 is about 596.1908968397.

The spelling of 211912230 in words is "two hundred eleven million, nine hundred twelve thousand, two hundred thirty".