220901171 has 2 divisors, whose sum is σ = 220901172. Its totient is φ = 220901170.

The previous prime is 220901117. The next prime is 220901203. The reversal of 220901171 is 171109022.

Together with previous prime (220901117) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220901171 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220901371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110450585 + 110450586.

It is an arithmetic number, because the mean of its divisors is an integer number (110450586).

Almost surely, 2^220901171 is an apocalyptic number.

220901171 is a deficient number, since it is larger than the sum of its proper divisors (1).

220901171 is an equidigital number, since it uses as much as digits as its factorization.

220901171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 220901171 is about 14862.7443966449. The cubic root of 220901171 is about 604.5042233042.

The spelling of 220901171 in words is "two hundred twenty million, nine hundred one thousand, one hundred seventy-one".