255315505 has 4 divisors (see below), whose sum is σ = 306378612. Its totient is φ = 204252400.

The previous prime is 255315499. The next prime is 255315509. The reversal of 255315505 is 505513552.

It is a happy number.

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 133610481 + 121705024 = 11559^2 + 11032^2 .

It is not a de Polignac number, because 255315505 - 2⁷ = 255315377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255315509) 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, 25531546 + ... + 25531555.

It is an arithmetic number, because the mean of its divisors is an integer number (76594653).

Almost surely, 2^255315505 is an apocalyptic number.

It is an amenable number.

255315505 is a deficient number, since it is larger than the sum of its proper divisors (51063107).

255315505 is an equidigital number, since it uses as much as digits as its factorization.

255315505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51063106.

The product of its (nonzero) digits is 18750, while the sum is 31.

The square root of 255315505 is about 15978.5952135975. The cubic root of 255315505 is about 634.3939947721.

The spelling of 255315505 in words is "two hundred fifty-five million, three hundred fifteen thousand, five hundred five".