216546513022231 has 4 divisors (see below), whose sum is σ = 247481729168272. Its totient is φ = 185611296876192.

The previous prime is 216546513022223. The next prime is 216546513022249. The reversal of 216546513022231 is 132220315645612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216546513022231 - 2³ = 216546513022223 is a prime.

It is a super-2 number, since 2×216546513022231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216546513022201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15467608073010 + ... + 15467608073023.

It is an arithmetic number, because the mean of its divisors is an integer number (61870432292068).

Almost surely, 2^{216546513022231} is an apocalyptic number.

216546513022231 is a deficient number, since it is larger than the sum of its proper divisors (30935216146041).

216546513022231 is an equidigital number, since it uses as much as digits as its factorization.

216546513022231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30935216146040.

The product of its (nonzero) digits is 518400, while the sum is 43.

Adding to 216546513022231 its reverse (132220315645612), we get a palindrome (348766828667843).

The spelling of 216546513022231 in words is "two hundred sixteen trillion, five hundred forty-six billion, five hundred thirteen million, twenty-two thousand, two hundred thirty-one".