255515 has 8 divisors (see below), whose sum is σ = 330288. Its totient is φ = 188640.

The previous prime is 255511. The next prime is 255517. The reversal of 255515 is 515552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 255515 - 2² = 255511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1901 + ... + 2030.

It is an arithmetic number, because the mean of its divisors is an integer number (41286).

2²⁵⁵⁵¹⁵ is an apocalyptic number.

255515 is a deficient number, since it is larger than the sum of its proper divisors (74773).

255515 is a wasteful number, since it uses less digits than its factorization.

255515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949.

The product of its digits is 1250, while the sum is 23.

The square root of 255515 is about 505.4849156998. The cubic root of 255515 is about 63.4559183175.

The spelling of 255515 in words is "two hundred fifty-five thousand, five hundred fifteen".