211390 has 8 divisors (see below), whose sum is σ = 380520. Its totient is φ = 84552.

The previous prime is 211373. The next prime is 211403. The reversal of 211390 is 93112.

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

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

211390 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10560 + ... + 10579.

It is an arithmetic number, because the mean of its divisors is an integer number (47565).

2²¹¹³⁹⁰ is an apocalyptic number.

211390 is a deficient number, since it is larger than the sum of its proper divisors (169130).

211390 is a wasteful number, since it uses less digits than its factorization.

211390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21146.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 211390 is about 459.7716824686. The cubic root of 211390 is about 59.5700749131.

The spelling of 211390 in words is "two hundred eleven thousand, three hundred ninety".