518413249 has 4 divisors (see below), whose sum is σ = 548908164. Its totient is φ = 487918336.

The previous prime is 518413213. The next prime is 518413321. The reversal of 518413249 is 942314815.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 482593024 + 35820225 = 21968^2 + 5985^2 .

It is a cyclic number.

It is not a de Polignac number, because 518413249 - 2⁷ = 518413121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518413849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15247432 + ... + 15247465.

It is an arithmetic number, because the mean of its divisors is an integer number (137227041).

Almost surely, 2^518413249 is an apocalyptic number.

It is an amenable number.

518413249 is a deficient number, since it is larger than the sum of its proper divisors (30494915).

518413249 is a wasteful number, since it uses less digits than its factorization.

518413249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30494914.

The product of its digits is 34560, while the sum is 37.

The square root of 518413249 is about 22768.6901028584. The cubic root of 518413249 is about 803.3263836492.

The spelling of 518413249 in words is "five hundred eighteen million, four hundred thirteen thousand, two hundred forty-nine".