401800171 has 2 divisors, whose sum is σ = 401800172. Its totient is φ = 401800170.

The previous prime is 401800141. The next prime is 401800183. The reversal of 401800171 is 171008104.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401800171 is a prime.

It is a super-2 number, since 2×401800171² = 322886754831258482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (401800111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200900085 + 200900086.

It is an arithmetic number, because the mean of its divisors is an integer number (200900086).

Almost surely, 2^401800171 is an apocalyptic number.

401800171 is a deficient number, since it is larger than the sum of its proper divisors (1).

401800171 is an equidigital number, since it uses as much as digits as its factorization.

401800171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 401800171 is about 20044.9537540000. The cubic root of 401800171 is about 737.9099601767.

Adding to 401800171 its reverse (171008104), we get a palindrome (572808275).

The spelling of 401800171 in words is "four hundred one million, eight hundred thousand, one hundred seventy-one".