216611273 has 8 divisors (see below), whose sum is σ = 220663296. Its totient is φ = 212587200.

The previous prime is 216611249. The next prime is 216611287. The reversal of 216611273 is 372116612.

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 216611273 - 2²² = 212416969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216611233) 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, 8993 + ... + 22673.

It is an arithmetic number, because the mean of its divisors is an integer number (27582912).

Almost surely, 2^216611273 is an apocalyptic number.

It is an amenable number.

216611273 is a deficient number, since it is larger than the sum of its proper divisors (4052023).

216611273 is a wasteful number, since it uses less digits than its factorization.

216611273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13975.

The product of its digits is 3024, while the sum is 29.

The square root of 216611273 is about 14717.7196943005. The cubic root of 216611273 is about 600.5654604419.

Adding to 216611273 its reverse (372116612), we get a palindrome (588727885).

The spelling of 216611273 in words is "two hundred sixteen million, six hundred eleven thousand, two hundred seventy-three".