55273921 has 8 divisors (see below), whose sum is σ = 56263680. Its totient is φ = 54290592.

The previous prime is 55273903. The next prime is 55273931. The reversal of 55273921 is 12937255.

55273921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55273921 - 2¹¹ = 55271873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55273931) 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 7 ways as a sum of consecutive naturals, for example, 17760 + ... + 20638.

It is an arithmetic number, because the mean of its divisors is an integer number (7032960).

Almost surely, 2^55273921 is an apocalyptic number.

It is an amenable number.

55273921 is a deficient number, since it is larger than the sum of its proper divisors (989759).

55273921 is a wasteful number, since it uses less digits than its factorization.

55273921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215.

The product of its digits is 18900, while the sum is 34.

The square root of 55273921 is about 7434.6433001187. The cubic root of 55273921 is about 380.9255393739.

The spelling of 55273921 in words is "fifty-five million, two hundred seventy-three thousand, nine hundred twenty-one".