255440123 has 16 divisors (see below), whose sum is σ = 274461600. Its totient is φ = 237012480.

The previous prime is 255440117. The next prime is 255440131. The reversal of 255440123 is 321044552.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 255440123 - 2⁸ = 255439867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255440092 and 255440101.

It is not an unprimeable number, because it can be changed into a prime (255440173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501593 + ... + 502101.

It is an arithmetic number, because the mean of its divisors is an integer number (17153850).

Almost surely, 2^255440123 is an apocalyptic number.

255440123 is a deficient number, since it is larger than the sum of its proper divisors (19021477).

255440123 is a wasteful number, since it uses less digits than its factorization.

255440123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 255440123 is about 15982.4942671662. The cubic root of 255440123 is about 634.4971926460.

Adding to 255440123 its reverse (321044552), we get a palindrome (576484675).

The spelling of 255440123 in words is "two hundred fifty-five million, four hundred forty thousand, one hundred twenty-three".