2170442321 has 2 divisors, whose sum is σ = 2170442322. Its totient is φ = 2170442320.

The previous prime is 2170442279. The next prime is 2170442341. The reversal of 2170442321 is 1232440712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1830556225 + 339886096 = 42785^2 + 18436^2 .

It is a cyclic number.

It is not a de Polignac number, because 2170442321 - 2²⁶ = 2103333457 is a prime.

It is not a weakly prime, because it can be changed into another prime (2170442341) 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, 1085221160 + 1085221161.

It is an arithmetic number, because the mean of its divisors is an integer number (1085221161).

Almost surely, 2^2170442321 is an apocalyptic number.

It is an amenable number.

2170442321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2170442321 is an equidigital number, since it uses as much as digits as its factorization.

2170442321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 2170442321 is about 46588.0061925814. The cubic root of 2170442321 is about 1294.7405493856.

The spelling of 2170442321 in words is "two billion, one hundred seventy million, four hundred forty-two thousand, three hundred twenty-one".