865223 has 8 divisors (see below), whose sum is σ = 907200. Its totient is φ = 824320.

The previous prime is 865217. The next prime is 865231. The reversal of 865223 is 322568.

865223 = 112² + 113² + ... + 158².

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

It is a cyclic number.

It is not a de Polignac number, because 865223 - 2⁶ = 865159 is a prime.

It is a super-2 number, since 2×865223² = 1497221679458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 865192 and 865201.

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 865223.

It is not an unprimeable number, because it can be changed into a prime (865213) 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, 1703 + ... + 2151.

It is an arithmetic number, because the mean of its divisors is an integer number (113400).

2⁸⁶⁵²²³ is an apocalyptic number.

865223 is a deficient number, since it is larger than the sum of its proper divisors (41977).

865223 is a wasteful number, since it uses less digits than its factorization.

865223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537.

The product of its digits is 2880, while the sum is 26.

The square root of 865223 is about 930.1736397039. The cubic root of 865223 is about 95.2889815483.

The spelling of 865223 in words is "eight hundred sixty-five thousand, two hundred twenty-three".