255120505 has 32 divisors (see below), whose sum is σ = 332576640. Its totient is φ = 187766208.

The previous prime is 255120499. The next prime is 255120517. The reversal of 255120505 is 505021552.

It is a happy number.

It is not a de Polignac number, because 255120505 - 2¹⁷ = 254989433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255120505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1474599 + ... + 1474771.

It is an arithmetic number, because the mean of its divisors is an integer number (10393020).

Almost surely, 2^255120505 is an apocalyptic number.

It is an amenable number.

255120505 is a deficient number, since it is larger than the sum of its proper divisors (77456135).

255120505 is an equidigital number, since it uses as much as digits as its factorization.

255120505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 255120505 is about 15972.4921349175. The cubic root of 255120505 is about 634.2324451938.

The spelling of 255120505 in words is "two hundred fifty-five million, one hundred twenty thousand, five hundred five".