216344371 has 4 divisors (see below), whose sum is σ = 225750672. Its totient is φ = 206938072.

The previous prime is 216344341. The next prime is 216344377. The reversal of 216344371 is 173443612.

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 216344371 - 2⁵ = 216344339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216344377) 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, 4703116 + ... + 4703161.

It is an arithmetic number, because the mean of its divisors is an integer number (56437668).

Almost surely, 2^216344371 is an apocalyptic number.

216344371 is a deficient number, since it is larger than the sum of its proper divisors (9406301).

216344371 is an equidigital number, since it uses as much as digits as its factorization.

216344371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9406300.

The product of its digits is 12096, while the sum is 31.

The square root of 216344371 is about 14708.6495301234. The cubic root of 216344371 is about 600.3186927320.

Adding to 216344371 its reverse (173443612), we get a palindrome (389787983).

The spelling of 216344371 in words is "two hundred sixteen million, three hundred forty-four thousand, three hundred seventy-one".