255252905 has 4 divisors (see below), whose sum is σ = 306303492. Its totient is φ = 204202320.

The previous prime is 255252901. The next prime is 255252917. The reversal of 255252905 is 509252552.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 170668096 + 84584809 = 13064^2 + 9197^2 .

It is not a de Polignac number, because 255252905 - 2² = 255252901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (255252901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25525286 + ... + 25525295.

It is an arithmetic number, because the mean of its divisors is an integer number (76575873).

Almost surely, 2^255252905 is an apocalyptic number.

It is an amenable number.

255252905 is a deficient number, since it is larger than the sum of its proper divisors (51050587).

255252905 is an equidigital number, since it uses as much as digits as its factorization.

255252905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51050586.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 255252905 is about 15976.6362229350. The cubic root of 255252905 is about 634.3421421826.

The spelling of 255252905 in words is "two hundred fifty-five million, two hundred fifty-two thousand, nine hundred five".