255991103 has 4 divisors (see below), whose sum is σ = 256027200. Its totient is φ = 255955008.

The previous prime is 255991069. The next prime is 255991111. The reversal of 255991103 is 301199552.

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

It is a cyclic number.

It is not a de Polignac number, because 255991103 - 2⁶ = 255991039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255991193) 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, 3503 + ... + 22896.

It is an arithmetic number, because the mean of its divisors is an integer number (64006800).

Almost surely, 2^255991103 is an apocalyptic number.

255991103 is a deficient number, since it is larger than the sum of its proper divisors (36097).

255991103 is an equidigital number, since it uses as much as digits as its factorization.

255991103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36096.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 255991103 is about 15999.7219663343. The cubic root of 255991103 is about 634.9530649171.

The spelling of 255991103 in words is "two hundred fifty-five million, nine hundred ninety-one thousand, one hundred three".