520753505 has 8 divisors (see below), whose sum is σ = 640146024. Its totient is φ = 406441600.

The previous prime is 520753481. The next prime is 520753613. The reversal of 520753505 is 505357025.

It can be written as a sum of positive squares in 4 ways, for example, as 4963984 + 515789521 = 2228^2 + 22711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520753505 - 2²² = 516559201 is a prime.

It is a Duffinian number.

It is a Curzon 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, 1269926 + ... + 1270335.

It is an arithmetic number, because the mean of its divisors is an integer number (80018253).

Almost surely, 2^520753505 is an apocalyptic number.

It is an amenable number.

520753505 is a deficient number, since it is larger than the sum of its proper divisors (119392519).

520753505 is a wasteful number, since it uses less digits than its factorization.

520753505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540307.

The product of its (nonzero) digits is 26250, while the sum is 32.

The square root of 520753505 is about 22820.0242112054. The cubic root of 520753505 is about 804.5333792533.

The spelling of 520753505 in words is "five hundred twenty million, seven hundred fifty-three thousand, five hundred five".