226623 has 4 divisors (see below), whose sum is σ = 302168. Its totient is φ = 151080.

The previous prime is 226621. The next prime is 226631. The reversal of 226623 is 326622.

226623 is nontrivially palindromic in base 13.

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

It is not a de Polignac number, because 226623 - 2¹ = 226621 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 226623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226621) 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, 37768 + ... + 37773.

It is an arithmetic number, because the mean of its divisors is an integer number (75542).

2²²⁶⁶²³ is an apocalyptic number.

226623 is a deficient number, since it is larger than the sum of its proper divisors (75545).

226623 is an equidigital number, since it uses as much as digits as its factorization.

226623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75544.

The product of its digits is 864, while the sum is 21.

The square root of 226623 is about 476.0493671879. The cubic root of 226623 is about 60.9679128925.

Subtracting 226623 from its reverse (326622), we obtain a palindrome (99999).

The spelling of 226623 in words is "two hundred twenty-six thousand, six hundred twenty-three".