520270561 has 4 divisors (see below), whose sum is σ = 524242224. Its totient is φ = 516298900.

The previous prime is 520270549. The next prime is 520270573. The reversal of 520270561 is 165072025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (520270549) and next prime (520270573).

It is a cyclic number.

It is not a de Polignac number, because 520270561 - 2¹¹ = 520268513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520270501) 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, 1985635 + ... + 1985896.

It is an arithmetic number, because the mean of its divisors is an integer number (131060556).

Almost surely, 2^520270561 is an apocalyptic number.

It is an amenable number.

520270561 is a deficient number, since it is larger than the sum of its proper divisors (3971663).

520270561 is a wasteful number, since it uses less digits than its factorization.

520270561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3971662.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 520270561 is about 22809.4401728758. The cubic root of 520270561 is about 804.2845956875.

The spelling of 520270561 in words is "five hundred twenty million, two hundred seventy thousand, five hundred sixty-one".