223911 has 8 divisors (see below), whose sum is σ = 331760. Its totient is φ = 149256.

The previous prime is 223903. The next prime is 223919. The reversal of 223911 is 119322.

It is a happy number.

223911 is nontrivially palindromic in base 4.

It is an interprime number because it is at equal distance from previous prime (223903) and next prime (223919).

It is not a de Polignac number, because 223911 - 2³ = 223903 is a prime.

It is a super-2 number, since 2×223911² = 100272271842, which contains 22 as substring.

It is a Duffinian number.

223911 is a lucky number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4120 + ... + 4173.

It is an arithmetic number, because the mean of its divisors is an integer number (41470).

2²²³⁹¹¹ is an apocalyptic number.

223911 is a deficient number, since it is larger than the sum of its proper divisors (107849).

223911 is an equidigital number, since it uses as much as digits as its factorization.

223911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8302 (or 8296 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 223911 is about 473.1923498959. The cubic root of 223911 is about 60.7237350262.

The spelling of 223911 in words is "two hundred twenty-three thousand, nine hundred eleven".