53081221 has 8 divisors (see below), whose sum is σ = 54506144. Its totient is φ = 51665040.

The previous prime is 53081201. The next prime is 53081227. The reversal of 53081221 is 12218035.

53081221 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 53081221 - 2²¹ = 50984069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53081192 and 53081201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53081227) 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, 11191 + ... + 15211.

It is an arithmetic number, because the mean of its divisors is an integer number (6813268).

Almost surely, 2^53081221 is an apocalyptic number.

It is an amenable number.

53081221 is a deficient number, since it is larger than the sum of its proper divisors (1424923).

53081221 is a wasteful number, since it uses less digits than its factorization.

53081221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 53081221 is about 7285.6860349592. The cubic root of 53081221 is about 375.8203575422.

Adding to 53081221 its reverse (12218035), we get a palindrome (65299256).

The spelling of 53081221 in words is "fifty-three million, eighty-one thousand, two hundred twenty-one".