53315221 has 2 divisors, whose sum is σ = 53315222. Its totient is φ = 53315220.

The previous prime is 53315209. The next prime is 53315237. The reversal of 53315221 is 12251335.

53315221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30371121 + 22944100 = 5511^2 + 4790^2 .

It is a cyclic number.

It is not a de Polignac number, because 53315221 - 2⁵ = 53315189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53315192 and 53315201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53315201) 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, 26657610 + 26657611.

It is an arithmetic number, because the mean of its divisors is an integer number (26657611).

Almost surely, 2^53315221 is an apocalyptic number.

It is an amenable number.

53315221 is a deficient number, since it is larger than the sum of its proper divisors (1).

53315221 is an equidigital number, since it uses as much as digits as its factorization.

53315221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 22.

The square root of 53315221 is about 7301.7272614088. The cubic root of 53315221 is about 376.3717958323.

Adding to 53315221 its reverse (12251335), we get a palindrome (65566556).

The spelling of 53315221 in words is "fifty-three million, three hundred fifteen thousand, two hundred twenty-one".