216241571181 has 8 divisors (see below), whose sum is σ = 288383734080. Its totient is φ = 144130227872.

The previous prime is 216241571149. The next prime is 216241571201. The reversal of 216241571181 is 181175142612.

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 216241571181 - 2⁵ = 216241571149 is a prime.

It is a super-2 number, since 2×216241571181² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216241571681) 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, 7688520 + ... + 7716593.

It is an arithmetic number, because the mean of its divisors is an integer number (36047966760).

Almost surely, 2^216241571181 is an apocalyptic number.

It is an amenable number.

216241571181 is a deficient number, since it is larger than the sum of its proper divisors (72142162899).

216241571181 is a wasteful number, since it uses less digits than its factorization.

216241571181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15409795.

The product of its digits is 26880, while the sum is 39.

The spelling of 216241571181 in words is "two hundred sixteen billion, two hundred forty-one million, five hundred seventy-one thousand, one hundred eighty-one".