216686127 has 32 divisors (see below), whose sum is σ = 350156800. Its totient is φ = 116430048.

The previous prime is 216686111. The next prime is 216686137. The reversal of 216686127 is 721686612.

It is not a de Polignac number, because 216686127 - 2⁴ = 216686111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216686137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53508 + ... + 57414.

It is an arithmetic number, because the mean of its divisors is an integer number (10942400).

Almost surely, 2^216686127 is an apocalyptic number.

216686127 is a deficient number, since it is larger than the sum of its proper divisors (133470673).

216686127 is a wasteful number, since it uses less digits than its factorization.

216686127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075.

The product of its digits is 48384, while the sum is 39.

The square root of 216686127 is about 14720.2624636927. The cubic root of 216686127 is about 600.6346312797.

The spelling of 216686127 in words is "two hundred sixteen million, six hundred eighty-six thousand, one hundred twenty-seven".