55478499 has 16 divisors (see below), whose sum is σ = 80378880. Its totient is φ = 33907680.

The previous prime is 55478419. The next prime is 55478509. The reversal of 55478499 is 99487455.

55478499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55478499 - 2⁸ = 55478243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55478419) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 13932 + ... + 17465.

It is an arithmetic number, because the mean of its divisors is an integer number (5023680).

Almost surely, 2^55478499 is an apocalyptic number.

55478499 is a deficient number, since it is larger than the sum of its proper divisors (24900381).

55478499 is a wasteful number, since it uses less digits than its factorization.

55478499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31450.

The product of its digits is 1814400, while the sum is 51.

The square root of 55478499 is about 7448.3890204527. The cubic root of 55478499 is about 381.3949170845.

The spelling of 55478499 in words is "fifty-five million, four hundred seventy-eight thousand, four hundred ninety-nine".