255543019 has 2 divisors, whose sum is σ = 255543020. Its totient is φ = 255543018.

The previous prime is 255543017. The next prime is 255543049. The reversal of 255543019 is 910345552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255543019 - 2¹ = 255543017 is a prime.

It is a super-2 number, since 2×255543019² = 130604469119268722, which contains 22 as substring.

Together with 255543017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (255543017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127771509 + 127771510.

It is an arithmetic number, because the mean of its divisors is an integer number (127771510).

Almost surely, 2^255543019 is an apocalyptic number.

255543019 is a deficient number, since it is larger than the sum of its proper divisors (1).

255543019 is an equidigital number, since it uses as much as digits as its factorization.

255543019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 255543019 is about 15985.7129650197. The cubic root of 255543019 is about 634.5823769390.

The spelling of 255543019 in words is "two hundred fifty-five million, five hundred forty-three thousand, nineteen".