255503281 has 4 divisors (see below), whose sum is σ = 278730864. Its totient is φ = 232275700.

The previous prime is 255503273. The next prime is 255503293. The reversal of 255503281 is 182305552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255503281 - 2³ = 255503273 is a prime.

It is a super-2 number, since 2×255503281² = 130563853203529922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255503201) 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, 11613775 + ... + 11613796.

It is an arithmetic number, because the mean of its divisors is an integer number (69682716).

Almost surely, 2^255503281 is an apocalyptic number.

It is an amenable number.

255503281 is a deficient number, since it is larger than the sum of its proper divisors (23227583).

255503281 is a wasteful number, since it uses less digits than its factorization.

255503281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23227582.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 255503281 is about 15984.4699943414. The cubic root of 255503281 is about 634.5494818361.

The spelling of 255503281 in words is "two hundred fifty-five million, five hundred three thousand, two hundred eighty-one".