216322651223 has 4 divisors (see below), whose sum is σ = 247225887120. Its totient is φ = 185419415328.

The previous prime is 216322651213. The next prime is 216322651253. The reversal of 216322651223 is 322156223612.

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

It is not a de Polignac number, because 216322651223 - 2¹⁴ = 216322634839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216322651213) 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, 15451617938 + ... + 15451617951.

It is an arithmetic number, because the mean of its divisors is an integer number (61806471780).

Almost surely, 2^216322651223 is an apocalyptic number.

216322651223 is a deficient number, since it is larger than the sum of its proper divisors (30903235897).

216322651223 is an equidigital number, since it uses as much as digits as its factorization.

216322651223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30903235896.

The product of its digits is 51840, while the sum is 35.

Adding to 216322651223 its reverse (322156223612), we get a palindrome (538478874835).

The spelling of 216322651223 in words is "two hundred sixteen billion, three hundred twenty-two million, six hundred fifty-one thousand, two hundred twenty-three".