2172493227844 has 27 divisors (see below), whose sum is σ = 3867703321951. Its totient is φ = 1067750165960.

The previous prime is 2172493227841. The next prime is 2172493227881. The reversal of 2172493227844 is 4487223942712.

The square root of 2172493227844 is 1473938.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172493227841) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 173918439 + ... + 173930929.

Almost surely, 2^{2172493227844} is an apocalyptic number.

2172493227844 is the 1473938-th square number.

It is an amenable number.

2172493227844 is a deficient number, since it is larger than the sum of its proper divisors (1695210094107).

2172493227844 is an frugal number, since it uses more digits than its factorization.

2172493227844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25104 (or 12552 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 55.

The spelling of 2172493227844 in words is "two trillion, one hundred seventy-two billion, four hundred ninety-three million, two hundred twenty-seven thousand, eight hundred forty-four".