55478723 has 4 divisors (see below), whose sum is σ = 55788840. Its totient is φ = 55168608.

The previous prime is 55478719. The next prime is 55478743. The reversal of 55478723 is 32787455.

55478723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 55478723 - 2² = 55478719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55478713) 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 3 ways as a sum of consecutive naturals, for example, 154790 + ... + 155147.

It is an arithmetic number, because the mean of its divisors is an integer number (13947210).

Almost surely, 2^55478723 is an apocalyptic number.

55478723 is a deficient number, since it is larger than the sum of its proper divisors (310117).

55478723 is a wasteful number, since it uses less digits than its factorization.

55478723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310116.

The product of its digits is 235200, while the sum is 41.

The square root of 55478723 is about 7448.4040572461. The cubic root of 55478723 is about 381.3954303905.

The spelling of 55478723 in words is "fifty-five million, four hundred seventy-eight thousand, seven hundred twenty-three".