55478017 has 8 divisors (see below), whose sum is σ = 63454976. Its totient is φ = 47513952.

The previous prime is 55477993. The next prime is 55478023. The reversal of 55478017 is 71087455.

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 55478017 - 2¹⁹ = 54953729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55470017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9208 + ... + 13990.

It is an arithmetic number, because the mean of its divisors is an integer number (7931872).

Almost surely, 2^55478017 is an apocalyptic number.

It is an amenable number.

55478017 is a deficient number, since it is larger than the sum of its proper divisors (7976959).

55478017 is a wasteful number, since it uses less digits than its factorization.

55478017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6447.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 55478017 is about 7448.3566643925. The cubic root of 55478017 is about 381.3938125552.

The spelling of 55478017 in words is "fifty-five million, four hundred seventy-eight thousand, seventeen".