204402220171 has 2 divisors, whose sum is σ = 204402220172. Its totient is φ = 204402220170.

The previous prime is 204402220109. The next prime is 204402220193. The reversal of 204402220171 is 171022204402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204402220171 - 2¹⁵ = 204402187403 is a prime.

It is a super-2 number, since 2×204402220171² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204402220271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102201110085 + 102201110086.

It is an arithmetic number, because the mean of its divisors is an integer number (102201110086).

Almost surely, 2^204402220171 is an apocalyptic number.

204402220171 is a deficient number, since it is larger than the sum of its proper divisors (1).

204402220171 is an equidigital number, since it uses as much as digits as its factorization.

204402220171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 25.

Adding to 204402220171 its reverse (171022204402), we get a palindrome (375424424573).

The spelling of 204402220171 in words is "two hundred four billion, four hundred two million, two hundred twenty thousand, one hundred seventy-one".