53222221 has 16 divisors (see below), whose sum is σ = 60076800. Its totient is φ = 46807488.

The previous prime is 53222219. The next prime is 53222227. The reversal of 53222221 is 12222235.

53222221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53222221 - 2¹ = 53222219 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53222227) 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 15 ways as a sum of consecutive naturals, for example, 28890 + ... + 30676.

It is an arithmetic number, because the mean of its divisors is an integer number (3754800).

Almost surely, 2^53222221 is an apocalyptic number.

It is an amenable number.

53222221 is a deficient number, since it is larger than the sum of its proper divisors (6854579).

53222221 is a wasteful number, since it uses less digits than its factorization.

53222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908.

The product of its digits is 480, while the sum is 19.

The square root of 53222221 is about 7295.3561256460. The cubic root of 53222221 is about 376.1528280387.

Adding to 53222221 its reverse (12222235), we get a palindrome (65444456).

The spelling of 53222221 in words is "fifty-three million, two hundred twenty-two thousand, two hundred twenty-one".