53286221 has 2 divisors, whose sum is σ = 53286222. Its totient is φ = 53286220.

The previous prime is 53286217. The next prime is 53286223. The reversal of 53286221 is 12268235.

53286221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51696100 + 1590121 = 7190^2 + 1261^2 .

It is a cyclic number.

It is not a de Polignac number, because 53286221 - 2² = 53286217 is a prime.

It is a Sophie Germain prime.

Together with 53286223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53286223) 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 as a sum of consecutive naturals, namely, 26643110 + 26643111.

It is an arithmetic number, because the mean of its divisors is an integer number (26643111).

Almost surely, 2^53286221 is an apocalyptic number.

It is an amenable number.

53286221 is a deficient number, since it is larger than the sum of its proper divisors (1).

53286221 is an equidigital number, since it uses as much as digits as its factorization.

53286221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 53286221 is about 7299.7411597946. The cubic root of 53286221 is about 376.3035428928.

The spelling of 53286221 in words is "fifty-three million, two hundred eighty-six thousand, two hundred twenty-one".