255717361 has 4 divisors (see below), whose sum is σ = 257346292. Its totient is φ = 254088432.

The previous prime is 255717337. The next prime is 255717367. The reversal of 255717361 is 163717552.

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 68574961 + 187142400 = 8281^2 + 13680^2 .

It is a cyclic number.

It is not a de Polignac number, because 255717361 - 2²¹ = 253620209 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 255717361.

It is not an unprimeable number, because it can be changed into a prime (255717367) 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, 814230 + ... + 814543.

It is an arithmetic number, because the mean of its divisors is an integer number (64336573).

Almost surely, 2^255717361 is an apocalyptic number.

It is an amenable number.

255717361 is a deficient number, since it is larger than the sum of its proper divisors (1628931).

255717361 is a wasteful number, since it uses less digits than its factorization.

255717361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628930.

The product of its digits is 44100, while the sum is 37.

The square root of 255717361 is about 15991.1650920125. The cubic root of 255717361 is about 634.7266569001.

The spelling of 255717361 in words is "two hundred fifty-five million, seven hundred seventeen thousand, three hundred sixty-one".