2172242543 has 2 divisors, whose sum is σ = 2172242544. Its totient is φ = 2172242542.

The previous prime is 2172242489. The next prime is 2172242557. The reversal of 2172242543 is 3452422712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2172242543 - 2²⁴ = 2155465327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172242573) by changing a digit.

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 as a sum of consecutive naturals, namely, 1086121271 + 1086121272.

It is an arithmetic number, because the mean of its divisors is an integer number (1086121272).

Almost surely, 2^2172242543 is an apocalyptic number.

2172242543 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172242543 is an equidigital number, since it uses as much as digits as its factorization.

2172242543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 32.

The square root of 2172242543 is about 46607.3228473810. The cubic root of 2172242543 is about 1295.0984144286.

The spelling of 2172242543 in words is "two billion, one hundred seventy-two million, two hundred forty-two thousand, five hundred forty-three".