816522 has 16 divisors (see below), whose sum is σ = 1866432. Its totient is φ = 233280.

The previous prime is 816521. The next prime is 816539. The reversal of 816522 is 225618.

816522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 816492 and 816501.

It is not an unprimeable number, because it can be changed into a prime (816521) 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, 9679 + ... + 9762.

It is an arithmetic number, because the mean of its divisors is an integer number (116652).

2⁸¹⁶⁵²² is an apocalyptic number.

816522 is an abundant number, since it is smaller than the sum of its proper divisors (1049910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816522 is a wasteful number, since it uses less digits than its factorization.

816522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19453.

The product of its digits is 960, while the sum is 24.

The square root of 816522 is about 903.6160689142. The cubic root of 816522 is about 93.4664964275.

The spelling of 816522 in words is "eight hundred sixteen thousand, five hundred twenty-two".