216341915 has 16 divisors (see below), whose sum is σ = 276994080. Its totient is φ = 161640960.

The previous prime is 216341911. The next prime is 216341927. The reversal of 216341915 is 519143612.

It is not a de Polignac number, because 216341915 - 2² = 216341911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216341911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1421 + ... + 20849.

It is an arithmetic number, because the mean of its divisors is an integer number (17312130).

Almost surely, 2^216341915 is an apocalyptic number.

216341915 is a deficient number, since it is larger than the sum of its proper divisors (60652165).

216341915 is a wasteful number, since it uses less digits than its factorization.

216341915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19582.

The product of its digits is 6480, while the sum is 32.

The square root of 216341915 is about 14708.5660415963. The cubic root of 216341915 is about 600.3164210631.

The spelling of 216341915 in words is "two hundred sixteen million, three hundred forty-one thousand, nine hundred fifteen".