53343250021 has 2 divisors, whose sum is σ = 53343250022. Its totient is φ = 53343250020.

The previous prime is 53343250019. The next prime is 53343250033. The reversal of 53343250021 is 12005234335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43559864100 + 9783385921 = 208710^2 + 98911^2 .

It is a cyclic number.

It is not a de Polignac number, because 53343250021 - 2¹ = 53343250019 is a prime.

Together with 53343250019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53343250421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26671625010 + 26671625011.

It is an arithmetic number, because the mean of its divisors is an integer number (26671625011).

Almost surely, 2^53343250021 is an apocalyptic number.

It is an amenable number.

53343250021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53343250021 is an equidigital number, since it uses as much as digits as its factorization.

53343250021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 53343250021 its reverse (12005234335), we get a palindrome (65348484356).

The spelling of 53343250021 in words is "fifty-three billion, three hundred forty-three million, two hundred fifty thousand, twenty-one".