53743021 has 2 divisors, whose sum is σ = 53743022. Its totient is φ = 53743020.

The previous prime is 53742889. The next prime is 53743033. The reversal of 53743021 is 12034735.

53743021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37380996 + 16362025 = 6114^2 + 4045^2 .

It is a cyclic number.

It is not a de Polignac number, because 53743021 - 2¹⁷ = 53611949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53743051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26871510 + 26871511.

It is an arithmetic number, because the mean of its divisors is an integer number (26871511).

Almost surely, 2^53743021 is an apocalyptic number.

It is an amenable number.

53743021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53743021 is an equidigital number, since it uses as much as digits as its factorization.

53743021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 53743021 is about 7330.9631700071. The cubic root of 53743021 is about 377.3757812426.

Adding to 53743021 its reverse (12034735), we get a palindrome (65777756).

The spelling of 53743021 in words is "fifty-three million, seven hundred forty-three thousand, twenty-one".