822563 has 6 divisors (see below), whose sum is σ = 956916. Its totient is φ = 705012.

The previous prime is 822557. The next prime is 822571. The reversal of 822563 is 365228.

It is a de Polignac number, because none of the positive numbers 2^k-822563 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (822553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8345 + ... + 8442.

It is an arithmetic number, because the mean of its divisors is an integer number (159486).

2⁸²²⁵⁶³ is an apocalyptic number.

822563 is a deficient number, since it is larger than the sum of its proper divisors (134353).

822563 is a wasteful number, since it uses less digits than its factorization.

822563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16801 (or 16794 counting only the distinct ones).

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

The square root of 822563 is about 906.9525897201. The cubic root of 822563 is about 93.6964328058.

The spelling of 822563 in words is "eight hundred twenty-two thousand, five hundred sixty-three".