520020541 has 4 divisors (see below), whose sum is σ = 520175452. Its totient is φ = 519865632.

The previous prime is 520020521. The next prime is 520020569. The reversal of 520020541 is 145020025.

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 97101316 + 422919225 = 9854^2 + 20565^2 .

It is a cyclic number.

It is not a de Polignac number, because 520020541 - 2⁵ = 520020509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520020521) 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, 72306 + ... + 79171.

It is an arithmetic number, because the mean of its divisors is an integer number (130043863).

Almost surely, 2^520020541 is an apocalyptic number.

It is an amenable number.

520020541 is a deficient number, since it is larger than the sum of its proper divisors (154911).

520020541 is a wasteful number, since it uses less digits than its factorization.

520020541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154910.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 520020541 is about 22803.9588887544. The cubic root of 520020541 is about 804.1557400050.

Adding to 520020541 its reverse (145020025), we get a palindrome (665040566).

The spelling of 520020541 in words is "five hundred twenty million, twenty thousand, five hundred forty-one".