518144481 has 6 divisors (see below), whose sum is σ = 748430930. Its totient is φ = 345429648.

The previous prime is 518144467. The next prime is 518144507. The reversal of 518144481 is 184441815.

It can be written as a sum of positive squares in only one way, i.e., 299843856 + 218300625 = 17316^2 + 14775^2 .

It is not a de Polignac number, because 518144481 - 2¹⁴ = 518128097 is a prime.

It is a super-2 number, since 2×518144481² = 536947406381518722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518144441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28785796 + ... + 28785813.

Almost surely, 2^518144481 is an apocalyptic number.

It is an amenable number.

518144481 is a deficient number, since it is larger than the sum of its proper divisors (230286449).

518144481 is a wasteful number, since it uses less digits than its factorization.

518144481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57571615 (or 57571612 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The square root of 518144481 is about 22762.7871975292. The cubic root of 518144481 is about 803.1875331930.

The spelling of 518144481 in words is "five hundred eighteen million, one hundred forty-four thousand, four hundred eighty-one".