520273013 has 4 divisors (see below), whose sum is σ = 560294028. Its totient is φ = 480252000.

The previous prime is 520273009. The next prime is 520273027. The reversal of 520273013 is 310372025.

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 350700529 + 169572484 = 18727^2 + 13022^2 .

It is a cyclic number.

It is not a de Polignac number, because 520273013 - 2² = 520273009 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 520273013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520273003) 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, 20010488 + ... + 20010513.

It is an arithmetic number, because the mean of its divisors is an integer number (140073507).

Almost surely, 2^520273013 is an apocalyptic number.

It is an amenable number.

520273013 is a deficient number, since it is larger than the sum of its proper divisors (40021015).

520273013 is a wasteful number, since it uses less digits than its factorization.

520273013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40021014.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 520273013 is about 22809.4939224876. The cubic root of 520273013 is about 804.2858591985.

The spelling of 520273013 in words is "five hundred twenty million, two hundred seventy-three thousand, thirteen".