55028447 has 4 divisors (see below), whose sum is σ = 55231776. Its totient is φ = 54825120.

The previous prime is 55028429. The next prime is 55028453. The reversal of 55028447 is 74482055.

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 55028447 - 2⁶ = 55028383 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55028497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101258 + ... + 101799.

It is an arithmetic number, because the mean of its divisors is an integer number (13807944).

Almost surely, 2^55028447 is an apocalyptic number.

55028447 is a deficient number, since it is larger than the sum of its proper divisors (203329).

55028447 is a wasteful number, since it uses less digits than its factorization.

55028447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203328.

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 55028447 is about 7418.1161355158. The cubic root of 55028447 is about 380.3607999808.

The spelling of 55028447 in words is "fifty-five million, twenty-eight thousand, four hundred forty-seven".