520013253 has 4 divisors (see below), whose sum is σ = 693351008. Its totient is φ = 346675500.

The previous prime is 520013213. The next prime is 520013257. The reversal of 520013253 is 352310025.

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 a de Polignac number, because none of the positive numbers 2^k-520013253 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 (520013257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86668873 + ... + 86668878.

It is an arithmetic number, because the mean of its divisors is an integer number (173337752).

Almost surely, 2^520013253 is an apocalyptic number.

It is an amenable number.

520013253 is a deficient number, since it is larger than the sum of its proper divisors (173337755).

520013253 is a wasteful number, since it uses less digits than its factorization.

520013253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173337754.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 520013253 is about 22803.7990913795. The cubic root of 520013253 is about 804.1519832852.

Adding to 520013253 its reverse (352310025), we get a palindrome (872323278).

The spelling of 520013253 in words is "five hundred twenty million, thirteen thousand, two hundred fifty-three".