823215 has 8 divisors (see below), whose sum is σ = 1317168. Its totient is φ = 439040.

The previous prime is 823201. The next prime is 823219. The reversal of 823215 is 512328.

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

It is not a de Polignac number, because 823215 - 2⁵ = 823183 is a prime.

It is a super-3 number, since 3×823215³ = 1673636275033390125, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 823191 and 823200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27426 + ... + 27455.

It is an arithmetic number, because the mean of its divisors is an integer number (164646).

2⁸²³²¹⁵ is an apocalyptic number.

823215 is a deficient number, since it is larger than the sum of its proper divisors (493953).

823215 is a wasteful number, since it uses less digits than its factorization.

823215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54889.

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

The square root of 823215 is about 907.3119639903. The cubic root of 823215 is about 93.7211822538.

The spelling of 823215 in words is "eight hundred twenty-three thousand, two hundred fifteen".