255251785 has 4 divisors (see below), whose sum is σ = 306302148. Its totient is φ = 204201424.

The previous prime is 255251779. The next prime is 255251791. The reversal of 255251785 is 587152552.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (255251779) and next prime (255251791).

It can be written as a sum of positive squares in 2 ways, for example, as 46131264 + 209120521 = 6792^2 + 14461^2 .

It is a cyclic number.

It is not a de Polignac number, because 255251785 - 2¹⁹ = 254727497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25525174 + ... + 25525183.

It is an arithmetic number, because the mean of its divisors is an integer number (76575537).

Almost surely, 2^255251785 is an apocalyptic number.

It is an amenable number.

255251785 is a deficient number, since it is larger than the sum of its proper divisors (51050363).

255251785 is an equidigital number, since it uses as much as digits as its factorization.

255251785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51050362.

The product of its digits is 140000, while the sum is 40.

The square root of 255251785 is about 15976.6011717136. The cubic root of 255251785 is about 634.3412143913.

It can be divided in two parts, 255251 and 785, that added together give a square (256036 = 506²).

The spelling of 255251785 in words is "two hundred fifty-five million, two hundred fifty-one thousand, seven hundred eighty-five".