2172245738 has 16 divisors (see below), whose sum is σ = 3510206280. Its totient is φ = 1002233856.

The previous prime is 2172245717. The next prime is 2172245753. The reversal of 2172245738 is 8375422712.

It can be written as a sum of positive squares in 4 ways, for example, as 1160560489 + 1011685249 = 34067^2 + 31807^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2172245695 and 2172245704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74006 + ... + 99102.

Almost surely, 2^2172245738 is an apocalyptic number.

2172245738 is a deficient number, since it is larger than the sum of its proper divisors (1337960542).

2172245738 is a wasteful number, since it uses less digits than its factorization.

2172245738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28441.

The product of its digits is 188160, while the sum is 41.

The square root of 2172245738 is about 46607.3571230981. The cubic root of 2172245738 is about 1295.0990493849.

The spelling of 2172245738 in words is "two billion, one hundred seventy-two million, two hundred forty-five thousand, seven hundred thirty-eight".