2172216269 has 4 divisors (see below), whose sum is σ = 2181305280. Its totient is φ = 2163127260.

The previous prime is 2172216223. The next prime is 2172216271. The reversal of 2172216269 is 9626122712.

2172216269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2172216269 - 2¹⁶ = 2172150733 is a prime.

It is a super-2 number, since 2×2172216269² = 9437047038616560722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172213269) 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, 4544147 + ... + 4544624.

It is an arithmetic number, because the mean of its divisors is an integer number (545326320).

Almost surely, 2^2172216269 is an apocalyptic number.

It is an amenable number.

2172216269 is a deficient number, since it is larger than the sum of its proper divisors (9089011).

2172216269 is an equidigital number, since it uses as much as digits as its factorization.

2172216269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9089010.

The product of its digits is 36288, while the sum is 38.

The square root of 2172216269 is about 46607.0409809505. The cubic root of 2172216269 is about 1295.0931928581.

The spelling of 2172216269 in words is "two billion, one hundred seventy-two million, two hundred sixteen thousand, two hundred sixty-nine".