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255804253 = 17119312613
BaseRepresentation
bin11110011111101…
…00001101011101
3122211100012110121
433033310031131
51010441214003
641214434541
76224204665
oct1717641535
9584305417
10255804253
11121438581
1271802a51
1340cc5583
1425d8b1a5
15176cdcbd
hexf3f435d

255804253 has 8 divisors (see below), whose sum is σ = 271100088. Its totient is φ = 240536064.

The previous prime is 255804251. The next prime is 255804271. The reversal of 255804253 is 352408552.

It can be written as a sum of positive squares in 4 ways, for example, as 60559524 + 195244729 = 7782^2 + 13973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255804253 - 21 = 255804251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255804251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13975 + ... + 26587.

It is an arithmetic number, because the mean of its divisors is an integer number (33887511).

Almost surely, 2255804253 is an apocalyptic number.

It is an amenable number.

255804253 is a deficient number, since it is larger than the sum of its proper divisors (15295835).

255804253 is a wasteful number, since it uses less digits than its factorization.

255804253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13823.

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 255804253 is about 15993.8817364641. The cubic root of 255804253 is about 634.7985415031.

The spelling of 255804253 in words is "two hundred fifty-five million, eight hundred four thousand, two hundred fifty-three".

Divisors: 1 17 1193 12613 20281 214421 15047309 255804253