520030251 has 12 divisors (see below), whose sum is σ = 808936128. Its totient is φ = 320018544.

The previous prime is 520030249. The next prime is 520030267. The reversal of 520030251 is 152030025.

It is a happy number.

It is not a de Polignac number, because 520030251 - 2¹ = 520030249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520030241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2222235 + ... + 2222468.

It is an arithmetic number, because the mean of its divisors is an integer number (67411344).

Almost surely, 2^520030251 is an apocalyptic number.

520030251 is a deficient number, since it is larger than the sum of its proper divisors (288905877).

520030251 is a wasteful number, since it uses less digits than its factorization.

520030251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444722 (or 4444719 counting only the distinct ones).

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

The square root of 520030251 is about 22804.1717893898. The cubic root of 520030251 is about 804.1607451302.

Adding to 520030251 its reverse (152030025), we get a palindrome (672060276).

The spelling of 520030251 in words is "five hundred twenty million, thirty thousand, two hundred fifty-one".