223815 has 16 divisors (see below), whose sum is σ = 367488. Its totient is φ = 116256.

The previous prime is 223781. The next prime is 223823. The reversal of 223815 is 518322.

It is not a de Polignac number, because 223815 - 2⁹ = 223303 is a prime.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 223791 and 223800.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 223815.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472 + ... + 818.

It is an arithmetic number, because the mean of its divisors is an integer number (22968).

2²²³⁸¹⁵ is an apocalyptic number.

223815 is a deficient number, since it is larger than the sum of its proper divisors (143673).

223815 is a wasteful number, since it uses less digits than its factorization.

223815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398.

The product of its digits is 480, while the sum is 21.

The square root of 223815 is about 473.0909003564. The cubic root of 223815 is about 60.7150555183.

The spelling of 223815 in words is "two hundred twenty-three thousand, eight hundred fifteen".