255278747 has 4 divisors (see below), whose sum is σ = 255353616. Its totient is φ = 255203880.

The previous prime is 255278743. The next prime is 255278773. The reversal of 255278747 is 747872552.

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

It is a cyclic number.

It is not a de Polignac number, because 255278747 - 2² = 255278743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255278741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32063 + ... + 39224.

It is an arithmetic number, because the mean of its divisors is an integer number (63838404).

Almost surely, 2^255278747 is an apocalyptic number.

255278747 is a deficient number, since it is larger than the sum of its proper divisors (74869).

255278747 is an equidigital number, since it uses as much as digits as its factorization.

255278747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74868.

The product of its digits is 1097600, while the sum is 47.

The square root of 255278747 is about 15977.4449459230. Note that the first 3 decimals coincide. The cubic root of 255278747 is about 634.3635485553.

The spelling of 255278747 in words is "two hundred fifty-five million, two hundred seventy-eight thousand, seven hundred forty-seven".