255305250505 has 4 divisors (see below), whose sum is σ = 306366300612. Its totient is φ = 204244200400.

The previous prime is 255305250503. The next prime is 255305250581. The reversal of 255305250505 is 505052503552.

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 109622574649 + 145682675856 = 331093^2 + 381684^2 .

It is not a de Polignac number, because 255305250505 - 2¹ = 255305250503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255305250503) 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, 25530525046 + ... + 25530525055.

It is an arithmetic number, because the mean of its divisors is an integer number (76591575153).

Almost surely, 2^255305250505 is an apocalyptic number.

It is an amenable number.

255305250505 is a deficient number, since it is larger than the sum of its proper divisors (51061050107).

255305250505 is an equidigital number, since it uses as much as digits as its factorization.

255305250505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51061050106.

The product of its (nonzero) digits is 187500, while the sum is 37.

The spelling of 255305250505 in words is "two hundred fifty-five billion, three hundred five million, two hundred fifty thousand, five hundred five".