55021753 has 4 divisors (see below), whose sum is σ = 55152868. Its totient is φ = 54890640.

The previous prime is 55021751. The next prime is 55021763. The reversal of 55021753 is 35712055.

55021753 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 can be written as a sum of positive squares in 2 ways, for example, as 17665209 + 37356544 = 4203^2 + 6112^2 .

It is a cyclic number.

It is not a de Polignac number, because 55021753 - 2¹ = 55021751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55021751) 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, 64926 + ... + 65767.

It is an arithmetic number, because the mean of its divisors is an integer number (13788217).

Almost surely, 2^55021753 is an apocalyptic number.

It is an amenable number.

55021753 is a deficient number, since it is larger than the sum of its proper divisors (131115).

55021753 is a wasteful number, since it uses less digits than its factorization.

55021753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131114.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 55021753 is about 7417.6649290730. The cubic root of 55021753 is about 380.3453762101.

The spelling of 55021753 in words is "fifty-five million, twenty-one thousand, seven hundred fifty-three".