212623 has 4 divisors (see below), whose sum is σ = 214200. Its totient is φ = 211048.

The previous prime is 212593. The next prime is 212627. The reversal of 212623 is 326212.

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 212623 - 2¹³ = 204431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212597 and 212606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212627) 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, 565 + ... + 862.

It is an arithmetic number, because the mean of its divisors is an integer number (53550).

2²¹²⁶²³ is an apocalyptic number.

212623 is a deficient number, since it is larger than the sum of its proper divisors (1577).

212623 is a wasteful number, since it uses less digits than its factorization.

212623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576.

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

The square root of 212623 is about 461.1106157963. The cubic root of 212623 is about 59.6856709782.

Adding to 212623 its reverse (326212), we get a palindrome (538835).

The spelling of 212623 in words is "two hundred twelve thousand, six hundred twenty-three".