2172238841 has 4 divisors (see below), whose sum is σ = 2266684032. Its totient is φ = 2077793652.

The previous prime is 2172238807. The next prime is 2172238847. The reversal of 2172238841 is 1488322712.

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 2172238841 - 2¹⁴ = 2172222457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2172238795 and 2172238804.

It is not an unprimeable number, because it can be changed into a prime (2172238847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47222561 + ... + 47222606.

It is an arithmetic number, because the mean of its divisors is an integer number (566671008).

Almost surely, 2^2172238841 is an apocalyptic number.

It is an amenable number.

2172238841 is a deficient number, since it is larger than the sum of its proper divisors (94445191).

2172238841 is an equidigital number, since it uses as much as digits as its factorization.

2172238841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94445190.

The product of its digits is 43008, while the sum is 38.

The square root of 2172238841 is about 46607.2831325749. The cubic root of 2172238841 is about 1295.0976787132.

The spelling of 2172238841 in words is "two billion, one hundred seventy-two million, two hundred thirty-eight thousand, eight hundred forty-one".