551998171 has 2 divisors, whose sum is σ = 551998172. Its totient is φ = 551998170.

The previous prime is 551998147. The next prime is 551998189. The reversal of 551998171 is 171899155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551998171 - 2⁹ = 551997659 is a prime.

It is equal to p_28944856 and since 551998171 and 28944856 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (551998141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275999085 + 275999086.

It is an arithmetic number, because the mean of its divisors is an integer number (275999086).

Almost surely, 2^551998171 is an apocalyptic number.

551998171 is a deficient number, since it is larger than the sum of its proper divisors (1).

551998171 is an equidigital number, since it uses as much as digits as its factorization.

551998171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 46.

The square root of 551998171 is about 23494.6413252043. The cubic root of 551998171 is about 820.3122799293.

The spelling of 551998171 in words is "five hundred fifty-one million, nine hundred ninety-eight thousand, one hundred seventy-one".