53503213 has 2 divisors, whose sum is σ = 53503214. Its totient is φ = 53503212.

The previous prime is 53503207. The next prime is 53503217. The reversal of 53503213 is 31230535.

It is a happy number.

53503213 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., 46416969 + 7086244 = 6813^2 + 2662^2 .

It is a cyclic number.

It is not a de Polignac number, because 53503213 - 2⁵ = 53503181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53503217) 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, 26751606 + 26751607.

It is an arithmetic number, because the mean of its divisors is an integer number (26751607).

Almost surely, 2^53503213 is an apocalyptic number.

It is an amenable number.

53503213 is a deficient number, since it is larger than the sum of its proper divisors (1).

53503213 is an equidigital number, since it uses as much as digits as its factorization.

53503213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 53503213 is about 7314.5890520247. The cubic root of 53503213 is about 376.8136451838.

Adding to 53503213 its reverse (31230535), we get a palindrome (84733748).

The spelling of 53503213 in words is "fifty-three million, five hundred three thousand, two hundred thirteen".