216243141 has 16 divisors (see below), whose sum is σ = 291791808. Its totient is φ = 142438400.

The previous prime is 216243091. The next prime is 216243149. The reversal of 216243141 is 141342612.

It is a cyclic number.

It is not a de Polignac number, because 216243141 - 2¹⁸ = 215980997 is a prime.

It is a super-3 number, since 3×216243141³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216243149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99931 + ... + 102071.

It is an arithmetic number, because the mean of its divisors is an integer number (18236988).

Almost surely, 2^216243141 is an apocalyptic number.

It is an amenable number.

216243141 is a deficient number, since it is larger than the sum of its proper divisors (75548667).

216243141 is a wasteful number, since it uses less digits than its factorization.

216243141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532.

The product of its digits is 1152, while the sum is 24.

The square root of 216243141 is about 14705.2079550070. The cubic root of 216243141 is about 600.2250461354.

Adding to 216243141 its reverse (141342612), we get a palindrome (357585753).

The spelling of 216243141 in words is "two hundred sixteen million, two hundred forty-three thousand, one hundred forty-one".