2172704423291 has 16 divisors (see below), whose sum is σ = 2260114619136. Its totient is φ = 2086439040000.

The previous prime is 2172704423273. The next prime is 2172704423297. The reversal of 2172704423291 is 1923244072712.

It is a cyclic number.

It is not a de Polignac number, because 2172704423291 - 2³⁸ = 1897826516347 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172704423297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1581881 + ... + 2616821.

It is an arithmetic number, because the mean of its divisors is an integer number (141257163696).

Almost surely, 2^{2172704423291} is an apocalyptic number.

2172704423291 is a deficient number, since it is larger than the sum of its proper divisors (87410195845).

2172704423291 is a wasteful number, since it uses less digits than its factorization.

2172704423291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035494.

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 2172704423291 in words is "two trillion, one hundred seventy-two billion, seven hundred four million, four hundred twenty-three thousand, two hundred ninety-one".