55220533 has 4 divisors (see below), whose sum is σ = 55236940. Its totient is φ = 55204128.

The previous prime is 55220531. The next prime is 55220551. The reversal of 55220533 is 33502255.

55220533 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 20857489 + 34363044 = 4567^2 + 5862^2 .

It is a cyclic number.

It is not a de Polignac number, because 55220533 - 2¹ = 55220531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55220498 and 55220507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55220531) 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, 1110 + ... + 10567.

It is an arithmetic number, because the mean of its divisors is an integer number (13809235).

Almost surely, 2^55220533 is an apocalyptic number.

It is an amenable number.

55220533 is a deficient number, since it is larger than the sum of its proper divisors (16407).

55220533 is a wasteful number, since it uses less digits than its factorization.

55220533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16406.

The product of its (nonzero) digits is 4500, while the sum is 25.

The square root of 55220533 is about 7431.0519443750. The cubic root of 55220533 is about 380.8028570221.

Adding to 55220533 its reverse (33502255), we get a palindrome (88722788).

The spelling of 55220533 in words is "fifty-five million, two hundred twenty thousand, five hundred thirty-three".