55546021 has 8 divisors (see below), whose sum is σ = 60248664. Its totient is φ = 51002880.

The previous prime is 55546019. The next prime is 55546031. The reversal of 55546021 is 12064555.

55546021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 17969121 + 37576900 = 4239^2 + 6130^2 .

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 55546021 - 2¹ = 55546019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55546031) 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, 39150 + ... + 40543.

It is an arithmetic number, because the mean of its divisors is an integer number (7531083).

Almost surely, 2^55546021 is an apocalyptic number.

It is an amenable number.

55546021 is a deficient number, since it is larger than the sum of its proper divisors (4702643).

55546021 is a wasteful number, since it uses less digits than its factorization.

55546021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79751.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 55546021 is about 7452.9203001240. The cubic root of 55546021 is about 381.5495842525.

The spelling of 55546021 in words is "fifty-five million, five hundred forty-six thousand, twenty-one".