2172155239 has 2 divisors, whose sum is σ = 2172155240. Its totient is φ = 2172155238.

The previous prime is 2172155231. The next prime is 2172155281. The reversal of 2172155239 is 9325512712.

It is a happy number.

2172155239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2172155239 - 2³ = 2172155231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2172155198 and 2172155207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172155231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086077619 + 1086077620.

It is an arithmetic number, because the mean of its divisors is an integer number (1086077620).

Almost surely, 2^2172155239 is an apocalyptic number.

2172155239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172155239 is an equidigital number, since it uses as much as digits as its factorization.

2172155239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 37.

The square root of 2172155239 is about 46606.3862469512. The cubic root of 2172155239 is about 1295.0810638819.

The spelling of 2172155239 in words is "two billion, one hundred seventy-two million, one hundred fifty-five thousand, two hundred thirty-nine".