53347321 has 2 divisors, whose sum is σ = 53347322. Its totient is φ = 53347320.

The previous prime is 53347319. The next prime is 53347339. The reversal of 53347321 is 12374335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38440000 + 14907321 = 6200^2 + 3861^2 .

It is a cyclic number.

It is not a de Polignac number, because 53347321 - 2¹ = 53347319 is a prime.

Together with 53347319, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 53347321.

It is not a weakly prime, because it can be changed into another prime (53347121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26673660 + 26673661.

It is an arithmetic number, because the mean of its divisors is an integer number (26673661).

Almost surely, 2^53347321 is an apocalyptic number.

It is an amenable number.

53347321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53347321 is an equidigital number, since it uses as much as digits as its factorization.

53347321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 28.

The square root of 53347321 is about 7303.9250406887. The cubic root of 53347321 is about 376.4473159217.

The spelling of 53347321 in words is "fifty-three million, three hundred forty-seven thousand, three hundred twenty-one".