255278697 has 4 divisors (see below), whose sum is σ = 340371600. Its totient is φ = 170185796.

The previous prime is 255278609. The next prime is 255278719. The reversal of 255278697 is 796872552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255278697 - 2¹¹ = 255276649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255278497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42546447 + ... + 42546452.

It is an arithmetic number, because the mean of its divisors is an integer number (85092900).

Almost surely, 2^255278697 is an apocalyptic number.

It is an amenable number.

255278697 is a deficient number, since it is larger than the sum of its proper divisors (85092903).

255278697 is an equidigital number, since it uses as much as digits as its factorization.

255278697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85092902.

The product of its digits is 2116800, while the sum is 51.

The square root of 255278697 is about 15977.4433812172. The cubic root of 255278697 is about 634.3635071389.

The spelling of 255278697 in words is "two hundred fifty-five million, two hundred seventy-eight thousand, six hundred ninety-seven".