255440365 has 4 divisors (see below), whose sum is σ = 306528444. Its totient is φ = 204352288.

The previous prime is 255440363. The next prime is 255440371. The reversal of 255440365 is 563044552.

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 201696804 + 53743561 = 14202^2 + 7331^2 .

It is a cyclic number.

It is not a de Polignac number, because 255440365 - 2¹ = 255440363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255440365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255440363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25544032 + ... + 25544041.

It is an arithmetic number, because the mean of its divisors is an integer number (76632111).

Almost surely, 2^255440365 is an apocalyptic number.

It is an amenable number.

255440365 is a deficient number, since it is larger than the sum of its proper divisors (51088079).

255440365 is an equidigital number, since it uses as much as digits as its factorization.

255440365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51088078.

The product of its (nonzero) digits is 72000, while the sum is 34.

The square root of 255440365 is about 15982.5018379476. The cubic root of 255440365 is about 634.4973930169.

The spelling of 255440365 in words is "two hundred fifty-five million, four hundred forty thousand, three hundred sixty-five".