518240073 has 8 divisors (see below), whose sum is σ = 744139648. Its totient is φ = 318916944.

The previous prime is 518240033. The next prime is 518240083. The reversal of 518240073 is 370042815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 518240073 - 2⁸ = 518239817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 518240073.

It is not an unprimeable number, because it can be changed into a prime (518240033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6644065 + ... + 6644142.

It is an arithmetic number, because the mean of its divisors is an integer number (93017456).

Almost surely, 2^518240073 is an apocalyptic number.

It is an amenable number.

518240073 is a deficient number, since it is larger than the sum of its proper divisors (225899575).

518240073 is a wasteful number, since it uses less digits than its factorization.

518240073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13288223.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 518240073 is about 22764.8868435580. The cubic root of 518240073 is about 803.2369232663.

Adding to 518240073 its reverse (370042815), we get a palindrome (888282888).

The spelling of 518240073 in words is "five hundred eighteen million, two hundred forty thousand, seventy-three".