555555442 has 16 divisors (see below), whose sum is σ = 918308160. Its totient is φ = 250446672.

The previous prime is 555555431. The next prime is 555555457. The reversal of 555555442 is 244555555.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 555555395 and 555555404.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 247342 + ... + 249577.

It is an arithmetic number, because the mean of its divisors is an integer number (57394260).

Almost surely, 2^555555442 is an apocalyptic number.

555555442 is a deficient number, since it is larger than the sum of its proper divisors (362752718).

555555442 is a wasteful number, since it uses less digits than its factorization.

555555442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496977.

The product of its digits is 500000, while the sum is 40.

The square root of 555555442 is about 23570.2236306744. The cubic root of 555555442 is about 822.0706354331.

The spelling of 555555442 in words is "five hundred fifty-five million, five hundred fifty-five thousand, four hundred forty-two".