2172644203 has 4 divisors (see below), whose sum is σ = 2181300408. Its totient is φ = 2163988000.

The previous prime is 2172644191. The next prime is 2172644297. The reversal of 2172644203 is 3024462712.

It is a happy number.

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 2172644203 - 2⁹ = 2172643691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172644003) 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, 4327726 + ... + 4328227.

It is an arithmetic number, because the mean of its divisors is an integer number (545325102).

Almost surely, 2^2172644203 is an apocalyptic number.

2172644203 is a deficient number, since it is larger than the sum of its proper divisors (8656205).

2172644203 is an equidigital number, since it uses as much as digits as its factorization.

2172644203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8656204.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 2172644203 is about 46611.6316277386. The cubic root of 2172644203 is about 1295.1782331965.

The spelling of 2172644203 in words is "two billion, one hundred seventy-two million, six hundred forty-four thousand, two hundred three".