2171225239 has 2 divisors, whose sum is σ = 2171225240. Its totient is φ = 2171225238.

The previous prime is 2171225219. The next prime is 2171225267. The reversal of 2171225239 is 9325221712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2171225239 - 2¹³ = 2171217047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2171225219) by changing a digit.

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 as a sum of consecutive naturals, namely, 1085612619 + 1085612620.

It is an arithmetic number, because the mean of its divisors is an integer number (1085612620).

Almost surely, 2^2171225239 is an apocalyptic number.

2171225239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171225239 is an equidigital number, since it uses as much as digits as its factorization.

2171225239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 2171225239 is about 46596.4080053388. The cubic root of 2171225239 is about 1294.8962094880.

The spelling of 2171225239 in words is "two billion, one hundred seventy-one million, two hundred twenty-five thousand, two hundred thirty-nine".