255555558 has 12 divisors (see below), whose sum is σ = 553703748. Its totient is φ = 85185180.

The previous prime is 255555533. The next prime is 255555647. The reversal of 255555558 is 855555552.

It is a super-3 number, since 3×255555558³ (a number of 26 digits) contains 333 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7098748 + ... + 7098783.

It is an arithmetic number, because the mean of its divisors is an integer number (46141979).

Almost surely, 2^255555558 is an apocalyptic number.

255555558 is an abundant number, since it is smaller than the sum of its proper divisors (298148190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255555558 is a wasteful number, since it uses less digits than its factorization.

255555558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14197539 (or 14197536 counting only the distinct ones).

The product of its digits is 1250000, while the sum is 45.

The square root of 255555558 is about 15986.1051541644. The cubic root of 255555558 is about 634.5927560111.

It can be divided in two parts, 25555 and 5558, that added together give a palindrome (31113).

The spelling of 255555558 in words is "two hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-eight".