518013441 has 32 divisors (see below), whose sum is σ = 864215040. Its totient is φ = 303814800.

The previous prime is 518013439. The next prime is 518013469. The reversal of 518013441 is 144310815.

It is a happy number.

It is not a de Polignac number, because 518013441 - 2¹ = 518013439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (518013491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18925 + ... + 37338.

It is an arithmetic number, because the mean of its divisors is an integer number (27006720).

Almost surely, 2^518013441 is an apocalyptic number.

It is an amenable number.

518013441 is a deficient number, since it is larger than the sum of its proper divisors (346201599).

518013441 is a wasteful number, since it uses less digits than its factorization.

518013441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56314 (or 56308 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 518013441 is about 22759.9086333843. The cubic root of 518013441 is about 803.1198181238.

The spelling of 518013441 in words is "five hundred eighteen million, thirteen thousand, four hundred forty-one".