520236172 has 48 divisors (see below), whose sum is σ = 993484800. Its totient is φ = 237631680.

The previous prime is 520236127. The next prime is 520236187. The reversal of 520236172 is 271632025.

It is a self number, because there is not a number n which added to its sum of digits gives 520236172.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224154 + ... + 226462.

It is an arithmetic number, because the mean of its divisors is an integer number (20697600).

Almost surely, 2^520236172 is an apocalyptic number.

It is an amenable number.

520236172 is a deficient number, since it is larger than the sum of its proper divisors (473248628).

520236172 is a wasteful number, since it uses less digits than its factorization.

520236172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446 (or 2444 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 520236172 is about 22808.6863278006. The cubic root of 520236172 is about 804.2668746820.

Adding to 520236172 its reverse (271632025), we get a palindrome (791868197).

The spelling of 520236172 in words is "five hundred twenty million, two hundred thirty-six thousand, one hundred seventy-two".