255103031605 has 4 divisors (see below), whose sum is σ = 306123637932. Its totient is φ = 204082425280.

The previous prime is 255103031587. The next prime is 255103031639. The reversal of 255103031605 is 506130301552.

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 181678832644 + 73424198961 = 426238^2 + 270969^2 .

It is not a de Polignac number, because 255103031605 - 2²³ = 255094642997 is a prime.

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25510303156 + ... + 25510303165.

It is an arithmetic number, because the mean of its divisors is an integer number (76530909483).

Almost surely, 2^255103031605 is an apocalyptic number.

It is an amenable number.

255103031605 is a deficient number, since it is larger than the sum of its proper divisors (51020606327).

255103031605 is an equidigital number, since it uses as much as digits as its factorization.

255103031605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51020606326.

The product of its (nonzero) digits is 13500, while the sum is 31.

The spelling of 255103031605 in words is "two hundred fifty-five billion, one hundred three million, thirty-one thousand, six hundred five".