520243571 has 8 divisors (see below), whose sum is σ = 552049344. Its totient is φ = 488571520.

The previous prime is 520243531. The next prime is 520243583. The reversal of 520243571 is 175342025.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 520243571 - 2¹⁴ = 520227187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520243531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25355 + ... + 41028.

It is an arithmetic number, because the mean of its divisors is an integer number (69006168).

Almost surely, 2^520243571 is an apocalyptic number.

520243571 is a deficient number, since it is larger than the sum of its proper divisors (31805773).

520243571 is a wasteful number, since it uses less digits than its factorization.

520243571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66861.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 520243571 is about 22808.8485242022. The cubic root of 520243571 is about 804.2706875287.

Adding to 520243571 its reverse (175342025), we get a palindrome (695585596).

The spelling of 520243571 in words is "five hundred twenty million, two hundred forty-three thousand, five hundred seventy-one".