216267755 has 16 divisors (see below), whose sum is σ = 283617504. Its totient is φ = 157006080.

The previous prime is 216267713. The next prime is 216267767. The reversal of 216267755 is 557762612.

It is not a de Polignac number, because 216267755 - 2¹² = 216263659 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30749 + ... + 37121.

It is an arithmetic number, because the mean of its divisors is an integer number (17726094).

Almost surely, 2^216267755 is an apocalyptic number.

216267755 is a deficient number, since it is larger than the sum of its proper divisors (67349749).

216267755 is a wasteful number, since it uses less digits than its factorization.

216267755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7006.

The product of its digits is 176400, while the sum is 41.

The square root of 216267755 is about 14706.0448455729. The cubic root of 216267755 is about 600.2478189252.

The spelling of 216267755 in words is "two hundred sixteen million, two hundred sixty-seven thousand, seven hundred fifty-five".