55555055 has 8 divisors (see below), whose sum is σ = 67066272. Its totient is φ = 44177248.

The previous prime is 55555043. The next prime is 55555057. The reversal of 55555055 is 55055555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55555055 - 2¹² = 55550959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555057) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 32432 + ... + 34101.

It is an arithmetic number, because the mean of its divisors is an integer number (8383284).

Almost surely, 2^55555055 is an apocalyptic number.

55555055 is a deficient number, since it is larger than the sum of its proper divisors (11511217).

55555055 is a wasteful number, since it uses less digits than its factorization.

55555055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66705.

The product of its (nonzero) digits is 78125, while the sum is 35.

The square root of 55555055 is about 7453.5263466362. The cubic root of 55555055 is about 381.5702681949.

Subtracting from 55555055 its reverse (55055555), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 55555055 in words is "fifty-five million, five hundred fifty-five thousand, fifty-five".