216243177 has 8 divisors (see below), whose sum is σ = 288665664. Its totient is φ = 143991408.

The previous prime is 216243163. The next prime is 216243187. The reversal of 216243177 is 771342612.

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

It is not a de Polignac number, because 216243177 - 2¹⁰ = 216242153 is a prime.

It is a super-2 number, since 2×216243177² = 93522223198106658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216243187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39693 + ... + 44810.

It is an arithmetic number, because the mean of its divisors is an integer number (36083208).

Almost surely, 2^216243177 is an apocalyptic number.

It is an amenable number.

216243177 is a deficient number, since it is larger than the sum of its proper divisors (72422487).

216243177 is an equidigital number, since it uses as much as digits as its factorization.

216243177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85359.

The product of its digits is 14112, while the sum is 33.

The square root of 216243177 is about 14705.2091790630. The cubic root of 216243177 is about 600.2250794437.

Adding to 216243177 its reverse (771342612), we get a palindrome (987585789).

The spelling of 216243177 in words is "two hundred sixteen million, two hundred forty-three thousand, one hundred seventy-seven".