520313540 has 24 divisors (see below), whose sum is σ = 1095400152. Its totient is φ = 207603200.

The previous prime is 520313527. The next prime is 520313587. The reversal of 520313540 is 45313025.

It can be written as a sum of positive squares in 4 ways, for example, as 360088576 + 160224964 = 18976^2 + 12658^2 .

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, 24419 + ... + 40458.

It is an arithmetic number, because the mean of its divisors is an integer number (45641673).

Almost surely, 2^520313540 is an apocalyptic number.

It is an amenable number.

520313540 is an abundant number, since it is smaller than the sum of its proper divisors (575086612).

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

520313540 is a wasteful number, since it uses less digits than its factorization.

520313540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65287 (or 65285 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 520313540 is about 22810.3822852665. The cubic root of 520313540 is about 804.3067421105.

Adding to 520313540 its reverse (45313025), we get a palindrome (565626565).

The spelling of 520313540 in words is "five hundred twenty million, three hundred thirteen thousand, five hundred forty".