520542205 has 4 divisors (see below), whose sum is σ = 624650652. Its totient is φ = 416433760.

The previous prime is 520542179. The next prime is 520542241. The reversal of 520542205 is 502245025.

It is a happy number.

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 119661721 + 400880484 = 10939^2 + 20022^2 .

It is not a de Polignac number, because 520542205 - 2²³ = 512153597 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 520542205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52054216 + ... + 52054225.

It is an arithmetic number, because the mean of its divisors is an integer number (156162663).

Almost surely, 2^520542205 is an apocalyptic number.

It is an amenable number.

520542205 is a deficient number, since it is larger than the sum of its proper divisors (104108447).

520542205 is a wasteful number, since it uses less digits than its factorization.

520542205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104108446.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 520542205 is about 22815.3940356067. The cubic root of 520542205 is about 804.4245491962.

The spelling of 520542205 in words is "five hundred twenty million, five hundred forty-two thousand, two hundred five".