255555830 has 32 divisors (see below), whose sum is σ = 476884800. Its totient is φ = 98485632.

The previous prime is 255555821. The next prime is 255555857. The reversal of 255555830 is 38555552.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 239879 + ... + 240941.

It is an arithmetic number, because the mean of its divisors is an integer number (14902650).

Almost surely, 2^255555830 is an apocalyptic number.

255555830 is a deficient number, since it is larger than the sum of its proper divisors (221328970).

255555830 is a wasteful number, since it uses less digits than its factorization.

255555830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928.

The product of its (nonzero) digits is 150000, while the sum is 38.

The square root of 255555830 is about 15986.1136615501. The cubic root of 255555830 is about 634.5929811535.

It can be divided in two parts, 2555 and 55830, that added together give a palindrome (58385).

The spelling of 255555830 in words is "two hundred fifty-five million, five hundred fifty-five thousand, eight hundred thirty".