522240 has 96 divisors (see below), whose sum is σ = 1769040. Its totient is φ = 131072.

The previous prime is 522239. The next prime is 522251. The reversal of 522240 is 42225.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 2.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

In principle, a polygon with 522240 sides can be constructed with ruler and compass.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30712 + ... + 30728.

2⁵²²²⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 522240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884520).

522240 is an abundant number, since it is smaller than the sum of its proper divisors (1246800).

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

522240 is a wasteful number, since it uses less digits than its factorization.

522240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 522240 is about 722.6617466007. The cubic root of 522240 is about 80.5298167648.

Subtracting from 522240 its sum of digits (15), we obtain a palindrome (522225).

Adding to 522240 its reverse (42225), we get a palindrome (564465).

The spelling of 522240 in words is "five hundred twenty-two thousand, two hundred forty".