55109555 has 8 divisors (see below), whose sum is σ = 66300432. Its totient is φ = 43975008.

The previous prime is 55109533. The next prime is 55109567. The reversal of 55109555 is 55590155.

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 55109555 - 2¹⁸ = 54847411 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11897 + ... + 15866.

It is an arithmetic number, because the mean of its divisors is an integer number (8287554).

Almost surely, 2^55109555 is an apocalyptic number.

55109555 is a deficient number, since it is larger than the sum of its proper divisors (11190877).

55109555 is a wasteful number, since it uses less digits than its factorization.

55109555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28165.

The product of its (nonzero) digits is 28125, while the sum is 35.

The square root of 55109555 is about 7423.5810091896. The cubic root of 55109555 is about 380.5475831254.

The spelling of 55109555 in words is "fifty-five million, one hundred nine thousand, five hundred fifty-five".