518481987 has 16 divisors (see below), whose sum is σ = 705133728. Its totient is φ = 338757120.

The previous prime is 518481961. The next prime is 518482001. The reversal of 518481987 is 789184815.

It is a happy number.

It is not a de Polignac number, because 518481987 - 2⁸ = 518481731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (518481907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275883 + ... + 277755.

It is an arithmetic number, because the mean of its divisors is an integer number (44070858).

Almost surely, 2^518481987 is an apocalyptic number.

518481987 is a deficient number, since it is larger than the sum of its proper divisors (186651741).

518481987 is a wasteful number, since it uses less digits than its factorization.

518481987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670.

The product of its digits is 645120, while the sum is 51.

The square root of 518481987 is about 22770.1995379926. The cubic root of 518481987 is about 803.3618872484.

It can be divided in two parts, 51848 and 1987, that added together give a palindrome (53835).

The spelling of 518481987 in words is "five hundred eighteen million, four hundred eighty-one thousand, nine hundred eighty-seven".