216445115 has 16 divisors (see below), whose sum is σ = 263165760. Its totient is φ = 170881920.

The previous prime is 216445091. The next prime is 216445123. The reversal of 216445115 is 511544612.

It is not a de Polignac number, because 216445115 - 2⁶ = 216445051 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168857 + ... + 170133.

It is an arithmetic number, because the mean of its divisors is an integer number (16447860).

Almost surely, 2^216445115 is an apocalyptic number.

216445115 is a deficient number, since it is larger than the sum of its proper divisors (46720645).

216445115 is a wasteful number, since it uses less digits than its factorization.

216445115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702.

The product of its digits is 4800, while the sum is 29.

The square root of 216445115 is about 14712.0737831211. The cubic root of 216445115 is about 600.4118607384.

Adding to 216445115 its reverse (511544612), we get a palindrome (727989727).

The spelling of 216445115 in words is "two hundred sixteen million, four hundred forty-five thousand, one hundred fifteen".