255615 has 8 divisors (see below), whose sum is σ = 409008. Its totient is φ = 136320.

The previous prime is 255613. The next prime is 255617. The reversal of 255615 is 516552.

It is an interprime number because it is at equal distance from previous prime (255613) and next prime (255617).

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

It is not a de Polignac number, because 255615 - 2¹ = 255613 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8506 + ... + 8535.

It is an arithmetic number, because the mean of its divisors is an integer number (51126).

2²⁵⁵⁶¹⁵ is an apocalyptic number.

255615 is a deficient number, since it is larger than the sum of its proper divisors (153393).

255615 is a wasteful number, since it uses less digits than its factorization.

255615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17049.

The product of its digits is 1500, while the sum is 24.

The square root of 255615 is about 505.5838209437. The cubic root of 255615 is about 63.4641954104.

The spelling of 255615 in words is "two hundred fifty-five thousand, six hundred fifteen".