2172744625 has 16 divisors (see below), whose sum is σ = 2748741840. Its totient is φ = 1714377600.

The previous prime is 2172744617. The next prime is 2172744643. The reversal of 2172744625 is 5264472712.

It can be written as a sum of positive squares in 8 ways, for example, as 912281616 + 1260463009 = 30204^2 + 35503^2 .

It is not a de Polignac number, because 2172744625 - 2³ = 2172744617 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109930 + ... + 128179.

It is an arithmetic number, because the mean of its divisors is an integer number (171796365).

Almost surely, 2^2172744625 is an apocalyptic number.

2172744625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2172744625 is a deficient number, since it is larger than the sum of its proper divisors (575997215).

2172744625 is an equidigital number, since it uses as much as digits as its factorization.

2172744625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238197 (or 238187 counting only the distinct ones).

The product of its digits is 188160, while the sum is 40.

The square root of 2172744625 is about 46612.7088356813. The cubic root of 2172744625 is about 1295.1981877423.

The spelling of 2172744625 in words is "two billion, one hundred seventy-two million, seven hundred forty-four thousand, six hundred twenty-five".