522918 has 48 divisors (see below), whose sum is σ = 1310400. Its totient is φ = 149040.

The previous prime is 522887. The next prime is 522919. The reversal of 522918 is 819225.

It is a junction number, because it is equal to n+sod(n) for n = 522891 and 522900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522919) 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 23 ways as a sum of consecutive naturals, for example, 3693 + ... + 3831.

It is an arithmetic number, because the mean of its divisors is an integer number (27300).

2⁵²²⁹¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 522918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (655200).

522918 is an abundant number, since it is smaller than the sum of its proper divisors (787482).

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

522918 is a wasteful number, since it uses less digits than its factorization.

522918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 174 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 522918 is about 723.1306935817. The cubic root of 522918 is about 80.5646510715.

The spelling of 522918 in words is "five hundred twenty-two thousand, nine hundred eighteen".