211056990 has 32 divisors (see below), whose sum is σ = 522878976. Its totient is φ = 54466080.

The previous prime is 211056977. The next prime is 211057001. The reversal of 211056990 is 99650112.

211056990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

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, 112542 + ... + 114401.

It is an arithmetic number, because the mean of its divisors is an integer number (16339968).

Almost surely, 2^211056990 is an apocalyptic number.

211056990 is an abundant number, since it is smaller than the sum of its proper divisors (311821986).

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

211056990 is a wasteful number, since it uses less digits than its factorization.

211056990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226984.

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 211056990 is about 14527.8005905918. The cubic root of 211056990 is about 595.3877753753.

The spelling of 211056990 in words is "two hundred eleven million, fifty-six thousand, nine hundred ninety".