223819 has 8 divisors (see below), whose sum is σ = 235872. Its totient is φ = 212160.

The previous prime is 223781. The next prime is 223823. The reversal of 223819 is 918322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223819 is a prime.

It is a super-2 number, since 2×223819² = 100189889522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 6.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 223793 and 223802.

It is not an unprimeable number, because it can be changed into a prime (223829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2122 + ... + 2224.

It is an arithmetic number, because the mean of its divisors is an integer number (29484).

2²²³⁸¹⁹ is an apocalyptic number.

223819 is a deficient number, since it is larger than the sum of its proper divisors (12053).

223819 is a wasteful number, since it uses less digits than its factorization.

223819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197.

The product of its digits is 864, while the sum is 25.

The square root of 223819 is about 473.0951278549. The cubic root of 223819 is about 60.7154172140.

The spelling of 223819 in words is "two hundred twenty-three thousand, eight hundred nineteen".