216047755 has 32 divisors (see below), whose sum is σ = 327172608. Its totient is φ = 133036800.

The previous prime is 216047719. The next prime is 216047761. The reversal of 216047755 is 557740612.

It is not a de Polignac number, because 216047755 - 2⁷ = 216047627 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28575 + ... + 35335.

It is an arithmetic number, because the mean of its divisors is an integer number (10224144).

Almost surely, 2^216047755 is an apocalyptic number.

216047755 is a deficient number, since it is larger than the sum of its proper divisors (111124853).

216047755 is a wasteful number, since it uses less digits than its factorization.

216047755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6867.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 216047755 is about 14698.5630250035. The cubic root of 216047755 is about 600.0442143343.

The spelling of 216047755 in words is "two hundred sixteen million, forty-seven thousand, seven hundred fifty-five".