216359438 has 4 divisors (see below), whose sum is σ = 324539160. Its totient is φ = 108179718.

The previous prime is 216359417. The next prime is 216359453. The reversal of 216359438 is 834953612.

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

It is a super-2 number, since 2×216359438² = 93622812823351688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216359395 and 216359404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54089858 + ... + 54089861.

It is an arithmetic number, because the mean of its divisors is an integer number (81134790).

Almost surely, 2^216359438 is an apocalyptic number.

216359438 is a deficient number, since it is larger than the sum of its proper divisors (108179722).

216359438 is a wasteful number, since it uses less digits than its factorization.

216359438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108179721.

The product of its digits is 155520, while the sum is 41.

The square root of 216359438 is about 14709.1617028300. The cubic root of 216359438 is about 600.3326285260.

The spelling of 216359438 in words is "two hundred sixteen million, three hundred fifty-nine thousand, four hundred thirty-eight".