520231145 has 16 divisors (see below), whose sum is σ = 738063360. Its totient is φ = 344428224.

The previous prime is 520231141. The next prime is 520231163. The reversal of 520231145 is 541132025.

It is not a de Polignac number, because 520231145 - 2² = 520231141 is a prime.

It is a super-2 number, since 2×520231145² = 541280888456022050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 520231145.

It is not an unprimeable number, because it can be changed into a prime (520231141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255257 + ... + 257286.

It is an arithmetic number, because the mean of its divisors is an integer number (46128960).

Almost surely, 2^520231145 is an apocalyptic number.

It is an amenable number.

520231145 is a deficient number, since it is larger than the sum of its proper divisors (217832215).

520231145 is a wasteful number, since it uses less digits than its factorization.

520231145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512584.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 520231145 is about 22808.5761282900. The cubic root of 520231145 is about 804.2642841518.

The spelling of 520231145 in words is "five hundred twenty million, two hundred thirty-one thousand, one hundred forty-five".