211963 has 4 divisors (see below), whose sum is σ = 213760. Its totient is φ = 210168.

The previous prime is 211949. The next prime is 211969. The reversal of 211963 is 369112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211963 - 2⁵ = 211931 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708 + ... + 961.

It is an arithmetic number, because the mean of its divisors is an integer number (53440).

2²¹¹⁹⁶³ is an apocalyptic number.

211963 is a deficient number, since it is larger than the sum of its proper divisors (1797).

211963 is a wasteful number, since it uses less digits than its factorization.

211963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its digits is 324, while the sum is 22.

The square root of 211963 is about 460.3943961431. The cubic root of 211963 is about 59.6238504907.

The spelling of 211963 in words is "two hundred eleven thousand, nine hundred sixty-three".