520320051 has 8 divisors (see below), whose sum is σ = 770844560. Its totient is φ = 346880016.

The previous prime is 520320049. The next prime is 520320067. The reversal of 520320051 is 150023025.

It is a happy number.

It is not a de Polignac number, because 520320051 - 2¹ = 520320049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520320091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9635530 + ... + 9635583.

It is an arithmetic number, because the mean of its divisors is an integer number (96355570).

Almost surely, 2^520320051 is an apocalyptic number.

520320051 is a deficient number, since it is larger than the sum of its proper divisors (250524509).

520320051 is a wasteful number, since it uses less digits than its factorization.

520320051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19271122 (or 19271116 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 520320051 is about 22810.5250049182. The cubic root of 520320051 is about 804.3100970231.

Adding to 520320051 its reverse (150023025), we get a palindrome (670343076).

The spelling of 520320051 in words is "five hundred twenty million, three hundred twenty thousand, fifty-one".