53324021 has 2 divisors, whose sum is σ = 53324022. Its totient is φ = 53324020.

The previous prime is 53324017. The next prime is 53324041. The reversal of 53324021 is 12042335.

It is a happy number.

It is an a-pointer prime, because the next prime (53324041) can be obtained adding 53324021 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43744996 + 9579025 = 6614^2 + 3095^2 .

It is a cyclic number.

It is not a de Polignac number, because 53324021 - 2² = 53324017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53323984 and 53324002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53324041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26662010 + 26662011.

It is an arithmetic number, because the mean of its divisors is an integer number (26662011).

Almost surely, 2^53324021 is an apocalyptic number.

It is an amenable number.

53324021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53324021 is an equidigital number, since it uses as much as digits as its factorization.

53324021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 53324021 is about 7302.3298336901. The cubic root of 53324021 is about 376.3925021742.

Adding to 53324021 its reverse (12042335), we get a palindrome (65366356).

The spelling of 53324021 in words is "fifty-three million, three hundred twenty-four thousand, twenty-one".