212263 has 4 divisors (see below), whose sum is σ = 213408. Its totient is φ = 211120.

The previous prime is 212243. The next prime is 212281. The reversal of 212263 is 362212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212263 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 (212203) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 223 + ... + 688.

It is an arithmetic number, because the mean of its divisors is an integer number (53352).

2²¹²²⁶³ is an apocalyptic number.

212263 is a deficient number, since it is larger than the sum of its proper divisors (1145).

212263 is an equidigital number, since it uses as much as digits as its factorization.

212263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144.

The product of its digits is 144, while the sum is 16.

The square root of 212263 is about 460.7200885570. The cubic root of 212263 is about 59.6519665974.

Adding to 212263 its reverse (362212), we get a palindrome (574475).

The spelling of 212263 in words is "two hundred twelve thousand, two hundred sixty-three".