216732212232169 has 4 divisors (see below), whose sum is σ = 216732297717460. Its totient is φ = 216732126746880.

The previous prime is 216732212232167. The next prime is 216732212232181. The reversal of 216732212232169 is 961232212237612.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10431847046569 + 206300365185600 = 3229837^2 + 14363160^2 .

It is a cyclic number.

It is not a de Polignac number, because 216732212232169 - 2¹ = 216732212232167 is a prime.

It is a super-2 number, since 2×216732212232169² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216732212232167) 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, 38819652 + ... + 44050309.

It is an arithmetic number, because the mean of its divisors is an integer number (54183074429365).

Almost surely, 2^{216732212232169} is an apocalyptic number.

It is an amenable number.

216732212232169 is a deficient number, since it is larger than the sum of its proper divisors (85485291).

216732212232169 is an equidigital number, since it uses as much as digits as its factorization.

216732212232169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85485290.

The product of its digits is 1306368, while the sum is 49.

The spelling of 216732212232169 in words is "two hundred sixteen trillion, seven hundred thirty-two billion, two hundred twelve million, two hundred thirty-two thousand, one hundred sixty-nine".