212663 has 4 divisors (see below), whose sum is σ = 232008. Its totient is φ = 193320.

The previous prime is 212651. The next prime is 212669. The reversal of 212663 is 366212.

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 212663 - 2¹⁰ = 211639 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 (212669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9656 + ... + 9677.

It is an arithmetic number, because the mean of its divisors is an integer number (58002).

2²¹²⁶⁶³ is an apocalyptic number.

212663 is a deficient number, since it is larger than the sum of its proper divisors (19345).

212663 is a wasteful number, since it uses less digits than its factorization.

212663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19344.

The product of its digits is 432, while the sum is 20.

The square root of 212663 is about 461.1539872971. The cubic root of 212663 is about 59.6894135604.

Adding to 212663 its reverse (366212), we get a palindrome (578875).

The spelling of 212663 in words is "two hundred twelve thousand, six hundred sixty-three".