524540224 has 56 divisors (see below), whose sum is σ = 1148367528. Its totient is φ = 236175360.

The previous prime is 524540213. The next prime is 524540227. The reversal of 524540224 is 422045425.

It can be written as a sum of positive squares in 4 ways, for example, as 45805824 + 478734400 = 6768^2 + 21880^2 .

It is a junction number, because it is equal to n+sod(n) for n = 524540192 and 524540201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (524540227) 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, 26424 + ... + 41800.

It is an arithmetic number, because the mean of its divisors is an integer number (20506563).

Almost surely, 2^524540224 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 524540224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574183764).

524540224 is an abundant number, since it is smaller than the sum of its proper divisors (623827304).

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

524540224 is a wasteful number, since it uses less digits than its factorization.

524540224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15443 (or 15433 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 524540224 is about 22902.8431422826. The cubic root of 524540224 is about 806.4787571626.

Adding to 524540224 its reverse (422045425), we get a palindrome (946585649).

The spelling of 524540224 in words is "five hundred twenty-four million, five hundred forty thousand, two hundred twenty-four".