518997441 has 4 divisors (see below), whose sum is σ = 691996592. Its totient is φ = 345998292.

The previous prime is 518997439. The next prime is 518997467. The reversal of 518997441 is 144799815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 518997441 - 2¹ = 518997439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518997421) 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, 86499571 + ... + 86499576.

It is an arithmetic number, because the mean of its divisors is an integer number (172999148).

Almost surely, 2^518997441 is an apocalyptic number.

It is an amenable number.

518997441 is a deficient number, since it is larger than the sum of its proper divisors (172999151).

518997441 is a wasteful number, since it uses less digits than its factorization.

518997441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172999150.

The product of its digits is 362880, while the sum is 48.

The square root of 518997441 is about 22781.5153359034. The cubic root of 518997441 is about 803.6280224652.

It can be divided in two parts, 51899 and 7441, that added together give a triangular number (59340 = T₃₄₄).

The spelling of 518997441 in words is "five hundred eighteen million, nine hundred ninety-seven thousand, four hundred forty-one".