55558105 has 4 divisors (see below), whose sum is σ = 66669732. Its totient is φ = 44446480.

The previous prime is 55558099. The next prime is 55558121. The reversal of 55558105 is 50185555.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11614464 + 43943641 = 3408^2 + 6629^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55558105 is a prime.

It is a super-3 number, since 3×55558105³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 5555806 + ... + 5555815.

It is an arithmetic number, because the mean of its divisors is an integer number (16667433).

Almost surely, 2^55558105 is an apocalyptic number.

It is an amenable number.

55558105 is a deficient number, since it is larger than the sum of its proper divisors (11111627).

55558105 is a wasteful number, since it uses less digits than its factorization.

55558105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111626.

The product of its (nonzero) digits is 25000, while the sum is 34.

The square root of 55558105 is about 7453.7309449698. The cubic root of 55558105 is about 381.5772508659.

The spelling of 55558105 in words is "fifty-five million, five hundred fifty-eight thousand, one hundred five".