2172065822939 has 4 divisors (see below), whose sum is σ = 2222578981656. Its totient is φ = 2121552664224.

The previous prime is 2172065822933. The next prime is 2172065822989. The reversal of 2172065822939 is 9392285602712.

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 2172065822939 - 2¹⁶ = 2172065757403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172065822933) 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, 25256579294 + ... + 25256579379.

It is an arithmetic number, because the mean of its divisors is an integer number (555644745414).

Almost surely, 2^{2172065822939} is an apocalyptic number.

2172065822939 is a deficient number, since it is larger than the sum of its proper divisors (50513158717).

2172065822939 is an equidigital number, since it uses as much as digits as its factorization.

2172065822939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50513158716.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 2172065822939 in words is "two trillion, one hundred seventy-two billion, sixty-five million, eight hundred twenty-two thousand, nine hundred thirty-nine".