216541361 has 8 divisors (see below), whose sum is σ = 223637760. Its totient is φ = 209548768.

The previous prime is 216541337. The next prime is 216541363. The reversal of 216541361 is 163145612.

It is a happy number.

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 216541361 - 2²⁶ = 149432497 is a prime.

It is a super-2 number, since 2×216541361² = 93780322047464642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216541363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21701 + ... + 30066.

It is an arithmetic number, because the mean of its divisors is an integer number (27954720).

Almost surely, 2^216541361 is an apocalyptic number.

It is an amenable number.

216541361 is a deficient number, since it is larger than the sum of its proper divisors (7096399).

216541361 is an equidigital number, since it uses as much as digits as its factorization.

216541361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51903.

The product of its digits is 4320, while the sum is 29.

The square root of 216541361 is about 14715.3444064351. The cubic root of 216541361 is about 600.5008419977.

Adding to 216541361 its reverse (163145612), we get a palindrome (379686973).

The spelling of 216541361 in words is "two hundred sixteen million, five hundred forty-one thousand, three hundred sixty-one".