520522240 has 160 divisors (see below), whose sum is σ = 1473905664. Its totient is φ = 172523520.

The previous prime is 520522199. The next prime is 520522241. The reversal of 520522240 is 42225025.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is not an unprimeable number, because it can be changed into a prime (520522241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555052 + ... + 555988.

Almost surely, 2^520522240 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 520522240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (736952832).

520522240 is an abundant number, since it is smaller than the sum of its proper divisors (953383424).

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

520522240 is an equidigital number, since it uses as much as digits as its factorization.

520522240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 982 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 520522240 is about 22814.9564978766. The cubic root of 520522240 is about 804.4142647010.

Adding to 520522240 its reverse (42225025), we get a palindrome (562747265).

The spelling of 520522240 in words is "five hundred twenty million, five hundred twenty-two thousand, two hundred forty".