53210321 has 2 divisors, whose sum is σ = 53210322. Its totient is φ = 53210320.

The previous prime is 53210309. The next prime is 53210327. The reversal of 53210321 is 12301235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28569025 + 24641296 = 5345^2 + 4964^2 .

It is a cyclic number.

It is not a de Polignac number, because 53210321 - 2⁶ = 53210257 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53210321.

It is not a weakly prime, because it can be changed into another prime (53210327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26605160 + 26605161.

It is an arithmetic number, because the mean of its divisors is an integer number (26605161).

Almost surely, 2^53210321 is an apocalyptic number.

It is an amenable number.

53210321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53210321 is an equidigital number, since it uses as much as digits as its factorization.

53210321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 53210321 is about 7294.5404927247. The cubic root of 53210321 is about 376.1247911760.

Adding to 53210321 its reverse (12301235), we get a palindrome (65511556).

The spelling of 53210321 in words is "fifty-three million, two hundred ten thousand, three hundred twenty-one".