255818245 has 4 divisors (see below), whose sum is σ = 306981900. Its totient is φ = 204654592.

The previous prime is 255818243. The next prime is 255818257. The reversal of 255818245 is 542818552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 148011556 + 107806689 = 12166^2 + 10383^2 .

It is a cyclic number.

It is not a de Polignac number, because 255818245 - 2¹ = 255818243 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 255818198 and 255818207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255818243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25581820 + ... + 25581829.

It is an arithmetic number, because the mean of its divisors is an integer number (76745475).

Almost surely, 2^255818245 is an apocalyptic number.

It is an amenable number.

255818245 is a deficient number, since it is larger than the sum of its proper divisors (51163655).

255818245 is an equidigital number, since it uses as much as digits as its factorization.

255818245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51163654.

The product of its digits is 128000, while the sum is 40.

The square root of 255818245 is about 15994.3191477474. The cubic root of 255818245 is about 634.8101153780.

The spelling of 255818245 in words is "two hundred fifty-five million, eight hundred eighteen thousand, two hundred forty-five".