53333321 has 2 divisors, whose sum is σ = 53333322. Its totient is φ = 53333320.

The previous prime is 53333311. The next prime is 53333347. The reversal of 53333321 is 12333335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39375625 + 13957696 = 6275^2 + 3736^2 .

It is a cyclic number.

It is not a de Polignac number, because 53333321 - 2⁶ = 53333257 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (53333311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26666660 + 26666661.

It is an arithmetic number, because the mean of its divisors is an integer number (26666661).

Almost surely, 2^53333321 is an apocalyptic number.

It is an amenable number.

53333321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53333321 is an equidigital number, since it uses as much as digits as its factorization.

53333321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2430, while the sum is 23.

The square root of 53333321 is about 7302.9665889966. The cubic root of 53333321 is about 376.4143825371.

Adding to 53333321 its reverse (12333335), we get a palindrome (65666656).

The spelling of 53333321 in words is "fifty-three million, three hundred thirty-three thousand, three hundred twenty-one".