255804247 has 4 divisors (see below), whose sum is σ = 255836560. Its totient is φ = 255771936.

The previous prime is 255804233. The next prime is 255804251. The reversal of 255804247 is 742408552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 255804247 - 2¹⁵ = 255771479 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 (255805247) 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, 4654 + ... + 23092.

It is an arithmetic number, because the mean of its divisors is an integer number (63959140).

Almost surely, 2^255804247 is an apocalyptic number.

255804247 is a deficient number, since it is larger than the sum of its proper divisors (32313).

255804247 is a wasteful number, since it uses less digits than its factorization.

255804247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32312.

The product of its (nonzero) digits is 89600, while the sum is 37.

The square root of 255804247 is about 15993.8815488924. The cubic root of 255804247 is about 634.7985365399.

The spelling of 255804247 in words is "two hundred fifty-five million, eight hundred four thousand, two hundred forty-seven".