53444422021 has 2 divisors, whose sum is σ = 53444422022. Its totient is φ = 53444422020.

The previous prime is 53444421977. The next prime is 53444422039. The reversal of 53444422021 is 12022444435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33457531396 + 19986890625 = 182914^2 + 141375^2 .

It is a cyclic number.

It is not a de Polignac number, because 53444422021 - 2¹⁹ = 53443897733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53444428021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26722211010 + 26722211011.

It is an arithmetic number, because the mean of its divisors is an integer number (26722211011).

Almost surely, 2^53444422021 is an apocalyptic number.

It is an amenable number.

53444422021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53444422021 is an equidigital number, since it uses as much as digits as its factorization.

53444422021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 53444422021 its reverse (12022444435), we get a palindrome (65466866456).

The spelling of 53444422021 in words is "fifty-three billion, four hundred forty-four million, four hundred twenty-two thousand, twenty-one".