53224321 has 2 divisors, whose sum is σ = 53224322. Its totient is φ = 53224320.

The previous prime is 53224319. The next prime is 53224387. The reversal of 53224321 is 12342235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39828721 + 13395600 = 6311^2 + 3660^2 .

It is a cyclic number.

It is not a de Polignac number, because 53224321 - 2¹ = 53224319 is a prime.

It is a super-2 number, since 2×53224321² = 5665656691822082, which contains 22 as substring.

Together with 53224319, it forms a pair of twin primes.

It is the 7296-th Hogben number.

It is a junction number, because it is equal to n+sod(n) for n = 53224292 and 53224301.

It is not a weakly prime, because it can be changed into another prime (53224021) by changing a digit.

It is a nontrivial repunit in base 7295.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26612160 + 26612161.

It is an arithmetic number, because the mean of its divisors is an integer number (26612161).

Almost surely, 2^53224321 is an apocalyptic number.

It is an amenable number.

53224321 is a deficient number, since it is larger than the sum of its proper divisors (1).

53224321 is an equidigital number, since it uses as much as digits as its factorization.

53224321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 22.

The square root of 53224321 is about 7295.5000514015. The cubic root of 53224321 is about 376.1577752865.

Adding to 53224321 its reverse (12342235), we get a palindrome (65566556).

The spelling of 53224321 in words is "fifty-three million, two hundred twenty-four thousand, three hundred twenty-one".