216355601 has 8 divisors (see below), whose sum is σ = 269742144. Its totient is φ = 168588720.

The previous prime is 216355597. The next prime is 216355619. The reversal of 216355601 is 106553612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216355601 - 2² = 216355597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216355001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1404830 + ... + 1404983.

It is an arithmetic number, because the mean of its divisors is an integer number (33717768).

Almost surely, 2^216355601 is an apocalyptic number.

It is an amenable number.

216355601 is a deficient number, since it is larger than the sum of its proper divisors (53386543).

216355601 is a wasteful number, since it uses less digits than its factorization.

216355601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809831.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 216355601 is about 14709.0312733368. The cubic root of 216355601 is about 600.3290796631.

The spelling of 216355601 in words is "two hundred sixteen million, three hundred fifty-five thousand, six hundred one".