216056577 has 16 divisors (see below), whose sum is σ = 324403200. Its totient is φ = 126718800.

The previous prime is 216056573. The next prime is 216056627. The reversal of 216056577 is 775650612.

It is not a de Polignac number, because 216056577 - 2² = 216056573 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216056573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104577 + ... + 106622.

It is an arithmetic number, because the mean of its divisors is an integer number (20275200).

Almost surely, 2^216056577 is an apocalyptic number.

It is an amenable number.

216056577 is a deficient number, since it is larger than the sum of its proper divisors (108346623).

216056577 is a wasteful number, since it uses less digits than its factorization.

216056577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211244.

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 216056577 is about 14698.8631193028. The cubic root of 216056577 is about 600.0523815379.

It can be divided in two parts, 21605 and 6577, that added together give a palindrome (28182).

The spelling of 216056577 in words is "two hundred sixteen million, fifty-six thousand, five hundred seventy-seven".