518421071 has 8 divisors (see below), whose sum is σ = 599620224. Its totient is φ = 439006680.

The previous prime is 518421041. The next prime is 518421077. The reversal of 518421071 is 170124815.

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

It is a de Polignac number, because none of the positive numbers 2^k-518421071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518421077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445565 + ... + 446726.

It is an arithmetic number, because the mean of its divisors is an integer number (74952528).

Almost surely, 2^518421071 is an apocalyptic number.

518421071 is a deficient number, since it is larger than the sum of its proper divisors (81199153).

518421071 is an equidigital number, since it uses as much as digits as its factorization.

518421071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892381.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 518421071 is about 22768.8618731811. The cubic root of 518421071 is about 803.3304239185.

Adding to 518421071 its reverse (170124815), we get a palindrome (688545886).

The spelling of 518421071 in words is "five hundred eighteen million, four hundred twenty-one thousand, seventy-one".