255559939 has 4 divisors (see below), whose sum is σ = 263803840. Its totient is φ = 247316040.

The previous prime is 255559921. The next prime is 255559949. The reversal of 255559939 is 939955552.

It is a happy number.

255559939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255559939 - 2⁵ = 255559907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255559949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4121904 + ... + 4121965.

It is an arithmetic number, because the mean of its divisors is an integer number (65950960).

Almost surely, 2^255559939 is an apocalyptic number.

255559939 is a deficient number, since it is larger than the sum of its proper divisors (8243901).

255559939 is an equidigital number, since it uses as much as digits as its factorization.

255559939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8243900.

The product of its digits is 2733750, while the sum is 52.

The square root of 255559939 is about 15986.2421788236. The cubic root of 255559939 is about 634.5963822741.

The spelling of 255559939 in words is "two hundred fifty-five million, five hundred fifty-nine thousand, nine hundred thirty-nine".