255772171 has 2 divisors, whose sum is σ = 255772172. Its totient is φ = 255772170.

The previous prime is 255772169. The next prime is 255772183. The reversal of 255772171 is 171277552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255772171 - 2¹ = 255772169 is a prime.

Together with 255772169, it forms a pair of twin primes.

It is equal to p_13977730 and since 255772171 and 13977730 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255772171.

It is not a weakly prime, because it can be changed into another prime (255772271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127886085 + 127886086.

It is an arithmetic number, because the mean of its divisors is an integer number (127886086).

Almost surely, 2^255772171 is an apocalyptic number.

255772171 is a deficient number, since it is larger than the sum of its proper divisors (1).

255772171 is an equidigital number, since it uses as much as digits as its factorization.

255772171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34300, while the sum is 37.

The square root of 255772171 is about 15992.8787589977. The cubic root of 255772171 is about 634.7720023844.

The spelling of 255772171 in words is "two hundred fifty-five million, seven hundred seventy-two thousand, one hundred seventy-one".