518421866 has 16 divisors (see below), whose sum is σ = 810521088. Its totient is φ = 248410800.

The previous prime is 518421857. The next prime is 518421877. The reversal of 518421866 is 668124815.

It is a super-2 number, since 2×518421866² = 537522462293843912, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 34205 + ... + 46976.

It is an arithmetic number, because the mean of its divisors is an integer number (50657568).

Almost surely, 2^518421866 is an apocalyptic number.

518421866 is a deficient number, since it is larger than the sum of its proper divisors (292099222).

518421866 is a wasteful number, since it uses less digits than its factorization.

518421866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81317.

The product of its digits is 92160, while the sum is 41.

The square root of 518421866 is about 22768.8793312275. The cubic root of 518421866 is about 803.3308345547.

The spelling of 518421866 in words is "five hundred eighteen million, four hundred twenty-one thousand, eight hundred sixty-six".