216489518 has 8 divisors (see below), whose sum is σ = 371124912. Its totient is φ = 92781216.

The previous prime is 216489503. The next prime is 216489521. The reversal of 216489518 is 815984612.

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

It is a super-2 number, since 2×216489518² = 93735422807744648, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 7731755 + ... + 7731782.

It is an arithmetic number, because the mean of its divisors is an integer number (46390614).

Almost surely, 2^216489518 is an apocalyptic number.

216489518 is a deficient number, since it is larger than the sum of its proper divisors (154635394).

216489518 is a wasteful number, since it uses less digits than its factorization.

216489518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15463546.

The product of its digits is 138240, while the sum is 44.

The square root of 216489518 is about 14713.5827723910. The cubic root of 216489518 is about 600.4529154341.

The spelling of 216489518 in words is "two hundred sixteen million, four hundred eighty-nine thousand, five hundred eighteen".