255776247 has 6 divisors (see below), whose sum is σ = 369454592. Its totient is φ = 170517492.

The previous prime is 255776221. The next prime is 255776351. The reversal of 255776247 is 742677552.

255776247 is a `hidden beast` number, since 2 + 557 + 76 + 24 + 7 = 666.

It is not a de Polignac number, because 255776247 - 2¹⁴ = 255759863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255776047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14209783 + ... + 14209800.

Almost surely, 2^255776247 is an apocalyptic number.

255776247 is a deficient number, since it is larger than the sum of its proper divisors (113678345).

255776247 is a wasteful number, since it uses less digits than its factorization.

255776247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28419589 (or 28419586 counting only the distinct ones).

The product of its digits is 823200, while the sum is 45.

The square root of 255776247 is about 15993.0061902070. The cubic root of 255776247 is about 634.7753742876.

The spelling of 255776247 in words is "two hundred fifty-five million, seven hundred seventy-six thousand, two hundred forty-seven".