226639 has 4 divisors (see below), whose sum is σ = 259024. Its totient is φ = 194256.

The previous prime is 226637. The next prime is 226643. The reversal of 226639 is 936622.

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 226639 - 2¹ = 226637 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 (226631) 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, 16182 + ... + 16195.

It is an arithmetic number, because the mean of its divisors is an integer number (64756).

2²²⁶⁶³⁹ is an apocalyptic number.

226639 is a deficient number, since it is larger than the sum of its proper divisors (32385).

226639 is an equidigital number, since it uses as much as digits as its factorization.

226639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32384.

The product of its digits is 3888, while the sum is 28.

The square root of 226639 is about 476.0661718711. The cubic root of 226639 is about 60.9693476743.

The spelling of 226639 in words is "two hundred twenty-six thousand, six hundred thirty-nine".