255723 has 16 divisors (see below), whose sum is σ = 376320. Its totient is φ = 153504.

The previous prime is 255713. The next prime is 255733. The reversal of 255723 is 327552.

It is an interprime number because it is at equal distance from previous prime (255713) and next prime (255733).

It is not a de Polignac number, because 255723 - 2⁶ = 255659 is a prime.

255723 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 255693 and 255702.

It is not an unprimeable number, because it can be changed into a prime (255713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3040 + ... + 3122.

It is an arithmetic number, because the mean of its divisors is an integer number (23520).

2²⁵⁵⁷²³ is an apocalyptic number.

255723 is a deficient number, since it is larger than the sum of its proper divisors (120597).

255723 is a wasteful number, since it uses less digits than its factorization.

255723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178.

The product of its digits is 2100, while the sum is 24.

The square root of 255723 is about 505.6906168795. The cubic root of 255723 is about 63.4731322464.

The spelling of 255723 in words is "two hundred fifty-five thousand, seven hundred twenty-three".