216415115 has 12 divisors (see below), whose sum is σ = 302098176. Its totient is φ = 148398768.

The previous prime is 216415103. The next prime is 216415181. The reversal of 216415115 is 511514612.

It is not a de Polignac number, because 216415115 - 2⁸ = 216414859 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 441419 + ... + 441908.

It is an arithmetic number, because the mean of its divisors is an integer number (25174848).

Almost surely, 2^216415115 is an apocalyptic number.

216415115 is a deficient number, since it is larger than the sum of its proper divisors (85683061).

216415115 is an equidigital number, since it uses as much as digits as its factorization.

216415115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883346 (or 883339 counting only the distinct ones).

The product of its digits is 1200, while the sum is 26.

The square root of 216415115 is about 14711.0541770466. The cubic root of 216415115 is about 600.3841197749.

Adding to 216415115 its reverse (511514612), we get a palindrome (727929727).

The spelling of 216415115 in words is "two hundred sixteen million, four hundred fifteen thousand, one hundred fifteen".