255545189 has 2 divisors, whose sum is σ = 255545190. Its totient is φ = 255545188.

The previous prime is 255545161. The next prime is 255545197. The reversal of 255545189 is 981545552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255520225 + 24964 = 15985^2 + 158^2 .

It is a cyclic number.

It is not a de Polignac number, because 255545189 - 2²⁴ = 238767973 is a prime.

It is equal to p_13965956 and since 255545189 and 13965956 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255545119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127772594 + 127772595.

It is an arithmetic number, because the mean of its divisors is an integer number (127772595).

Almost surely, 2^255545189 is an apocalyptic number.

It is an amenable number.

255545189 is a deficient number, since it is larger than the sum of its proper divisors (1).

255545189 is an equidigital number, since it uses as much as digits as its factorization.

255545189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360000, while the sum is 44.

The square root of 255545189 is about 15985.7808379822. The cubic root of 255545189 is about 634.5841731660.

The spelling of 255545189 in words is "two hundred fifty-five million, five hundred forty-five thousand, one hundred eighty-nine".