223826 has 4 divisors (see below), whose sum is σ = 335742. Its totient is φ = 111912.

The previous prime is 223823. The next prime is 223829. The reversal of 223826 is 628322.

223826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 628322 = 2 ⋅314161.

It is an interprime number because it is at equal distance from previous prime (223823) and next prime (223829).

It can be written as a sum of positive squares in only one way, i.e., 133225 + 90601 = 365^2 + 301^2 .

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (223823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55955 + ... + 55958.

2²²³⁸²⁶ is an apocalyptic number.

223826 is a deficient number, since it is larger than the sum of its proper divisors (111916).

223826 is a wasteful number, since it uses less digits than its factorization.

223826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111915.

The product of its digits is 1152, while the sum is 23.

The square root of 223826 is about 473.1025258863. The cubic root of 223826 is about 60.7160501712.

Subtracting 223826 from its reverse (628322), we obtain a square (404496 = 636²).

The spelling of 223826 in words is "two hundred twenty-three thousand, eight hundred twenty-six".