211390105 has 8 divisors (see below), whose sum is σ = 267019200. Its totient is φ = 160211376.

The previous prime is 211390073. The next prime is 211390111. The reversal of 211390105 is 501093112.

211390105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211390105 - 2⁵ = 211390073 is a prime.

It is a super-2 number, since 2×211390105² = 89371552983822050, which contains 22 as substring.

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, 1112485 + ... + 1112674.

It is an arithmetic number, because the mean of its divisors is an integer number (33377400).

Almost surely, 2^211390105 is an apocalyptic number.

It is an amenable number.

211390105 is a deficient number, since it is larger than the sum of its proper divisors (55629095).

211390105 is a wasteful number, since it uses less digits than its factorization.

211390105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225183.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 211390105 is about 14539.2608133976. The cubic root of 211390105 is about 595.7008477611.

The spelling of 211390105 in words is "two hundred eleven million, three hundred ninety thousand, one hundred five".