520705503 has 24 divisors (see below), whose sum is σ = 793228800. Its totient is φ = 341243928.

The previous prime is 520705501. The next prime is 520705513. The reversal of 520705503 is 305507025.

It is not a de Polignac number, because 520705503 - 2¹ = 520705501 is a prime.

It is a super-2 number, since 2×520705503² = 542268441708966018, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520705501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3823 + ... + 32496.

It is an arithmetic number, because the mean of its divisors is an integer number (33051200).

Almost surely, 2^520705503 is an apocalyptic number.

520705503 is a deficient number, since it is larger than the sum of its proper divisors (272523297).

520705503 is an equidigital number, since it uses as much as digits as its factorization.

520705503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36393 (or 36381 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 520705503 is about 22818.9724352347. The cubic root of 520705503 is about 804.5086584096.

It can be divided in two parts, 52070550 and 3, that multiplied together give a triangular number (156211650 = T₁₇₆₇₅).

The spelling of 520705503 in words is "five hundred twenty million, seven hundred five thousand, five hundred three".