520475761 has 4 divisors (see below), whose sum is σ = 560512372. Its totient is φ = 480439152.

The previous prime is 520475743. The next prime is 520475777. The reversal of 520475761 is 167574025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50410000 + 470065761 = 7100^2 + 21681^2 .

It is a cyclic number.

It is not a de Polignac number, because 520475761 - 2¹⁷ = 520344689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520475761.

It is not an unprimeable number, because it can be changed into a prime (520475161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20018286 + ... + 20018311.

It is an arithmetic number, because the mean of its divisors is an integer number (140128093).

Almost surely, 2^520475761 is an apocalyptic number.

It is an amenable number.

520475761 is a deficient number, since it is larger than the sum of its proper divisors (40036611).

520475761 is a wasteful number, since it uses less digits than its factorization.

520475761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40036610.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 520475761 is about 22813.9378670145. The cubic root of 520475761 is about 804.3903211301.

The spelling of 520475761 in words is "five hundred twenty million, four hundred seventy-five thousand, seven hundred sixty-one".