216166515 has 32 divisors (see below), whose sum is σ = 368716800. Its totient is φ = 107827200.

The previous prime is 216166513. The next prime is 216166541. The reversal of 216166515 is 515661612.

216166515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216166515 - 2¹ = 216166513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216166513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17715 + ... + 27315.

It is an arithmetic number, because the mean of its divisors is an integer number (11522400).

Almost surely, 2^216166515 is an apocalyptic number.

216166515 is a deficient number, since it is larger than the sum of its proper divisors (152550285).

216166515 is a wasteful number, since it uses less digits than its factorization.

216166515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9707.

The product of its digits is 10800, while the sum is 33.

The square root of 216166515 is about 14702.6023206778. The cubic root of 216166515 is about 600.1541409531.

The spelling of 216166515 in words is "two hundred sixteen million, one hundred sixty-six thousand, five hundred fifteen".