55478473 has 4 divisors (see below), whose sum is σ = 55502080. Its totient is φ = 55454868.

The previous prime is 55478419. The next prime is 55478509. The reversal of 55478473 is 37487455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55478473 - 2¹⁷ = 55347401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55478413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7833 + ... + 13126.

It is an arithmetic number, because the mean of its divisors is an integer number (13875520).

Almost surely, 2^55478473 is an apocalyptic number.

It is an amenable number.

55478473 is a deficient number, since it is larger than the sum of its proper divisors (23607).

55478473 is a wasteful number, since it uses less digits than its factorization.

55478473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23606.

The product of its digits is 470400, while the sum is 43.

The square root of 55478473 is about 7448.3872751086. The cubic root of 55478473 is about 381.3948575042.

The spelling of 55478473 in words is "fifty-five million, four hundred seventy-eight thousand, four hundred seventy-three".