255805715357243 has 4 divisors (see below), whose sum is σ = 255806815399008. Its totient is φ = 255804615315480.

The previous prime is 255805715357239. The next prime is 255805715357263. The reversal of 255805715357243 is 342753517508552.

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 255805715357243 - 2² = 255805715357239 is a prime.

It is a super-2 number, since 2×255805715357243² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255805715357233) 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, 549671996 + ... + 550137177.

It is an arithmetic number, because the mean of its divisors is an integer number (63951703849752).

Almost surely, 2^{255805715357243} is an apocalyptic number.

255805715357243 is a deficient number, since it is larger than the sum of its proper divisors (1100041765).

255805715357243 is a wasteful number, since it uses less digits than its factorization.

255805715357243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100041764.

The product of its (nonzero) digits is 176400000, while the sum is 62.

The spelling of 255805715357243 in words is "two hundred fifty-five trillion, eight hundred five billion, seven hundred fifteen million, three hundred fifty-seven thousand, two hundred forty-three".