520541240 has 32 divisors (see below), whose sum is σ = 1174037760. Its totient is φ = 207715200.

The previous prime is 520541237. The next prime is 520541251. The reversal of 520541240 is 42145025.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1385 + ... + 32295.

It is an arithmetic number, because the mean of its divisors is an integer number (36688680).

Almost surely, 2^520541240 is an apocalyptic number.

It is an amenable number.

520541240 is an abundant number, since it is smaller than the sum of its proper divisors (653496520).

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

520541240 is a wasteful number, since it uses less digits than its factorization.

520541240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31343 (or 31339 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 520541240 is about 22815.3728875949. The cubic root of 520541240 is about 804.4240521055.

Adding to 520541240 its reverse (42145025), we get a palindrome (562686265).

The spelling of 520541240 in words is "five hundred twenty million, five hundred forty-one thousand, two hundred forty".