171222041 has 2 divisors, whose sum is σ = 171222042. Its totient is φ = 171222040.

The previous prime is 171222031. The next prime is 171222043. The reversal of 171222041 is 140222171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164352400 + 6869641 = 12820^2 + 2621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171222041 is a prime.

Together with 171222043, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (171222043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85611020 + 85611021.

It is an arithmetic number, because the mean of its divisors is an integer number (85611021).

Almost surely, 2^171222041 is an apocalyptic number.

It is an amenable number.

171222041 is a deficient number, since it is larger than the sum of its proper divisors (1).

171222041 is an equidigital number, since it uses as much as digits as its factorization.

171222041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 171222041 is about 13085.1840262184. The cubic root of 171222041 is about 555.2900477807.

The spelling of 171222041 in words is "one hundred seventy-one million, two hundred twenty-two thousand, forty-one".