255889247 has 4 divisors (see below), whose sum is σ = 260717400. Its totient is φ = 251061096.

The previous prime is 255889223. The next prime is 255889261. The reversal of 255889247 is 742988552.

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 255889247 - 2²⁰ = 254840671 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255889195 and 255889204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255889267) 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, 2413997 + ... + 2414102.

It is an arithmetic number, because the mean of its divisors is an integer number (65179350).

Almost surely, 2^255889247 is an apocalyptic number.

255889247 is a deficient number, since it is larger than the sum of its proper divisors (4828153).

255889247 is an equidigital number, since it uses as much as digits as its factorization.

255889247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4828152.

The product of its digits is 1612800, while the sum is 50.

The square root of 255889247 is about 15996.5385943335. The cubic root of 255889247 is about 634.8688401684.

The spelling of 255889247 in words is "two hundred fifty-five million, eight hundred eighty-nine thousand, two hundred forty-seven".