215966116 has 6 divisors (see below), whose sum is σ = 377940710. Its totient is φ = 107983056.

The previous prime is 215966063. The next prime is 215966209. The reversal of 215966116 is 611669512.

It can be written as a sum of positive squares in only one way, i.e., 122766400 + 93199716 = 11080^2 + 9654^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26995761 + ... + 26995768.

Almost surely, 2^215966116 is an apocalyptic number.

It is an amenable number.

215966116 is a deficient number, since it is larger than the sum of its proper divisors (161974594).

215966116 is a wasteful number, since it uses less digits than its factorization.

215966116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53991533 (or 53991531 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 215966116 is about 14695.7856543977. The cubic root of 215966116 is about 599.9686242852.

The spelling of 215966116 in words is "two hundred fifteen million, nine hundred sixty-six thousand, one hundred sixteen".