52537721 has 2 divisors, whose sum is σ = 52537722. Its totient is φ = 52537720.

The previous prime is 52537711. The next prime is 52537729. The reversal of 52537721 is 12773525.

52537721 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., 45751696 + 6786025 = 6764^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 52537721 - 2²² = 48343417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52537729) 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, 26268860 + 26268861.

It is an arithmetic number, because the mean of its divisors is an integer number (26268861).

Almost surely, 2^52537721 is an apocalyptic number.

It is an amenable number.

52537721 is a deficient number, since it is larger than the sum of its proper divisors (1).

52537721 is an equidigital number, since it uses as much as digits as its factorization.

52537721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 32.

The square root of 52537721 is about 7248.2909019989. The cubic root of 52537721 is about 374.5332765441.

The spelling of 52537721 in words is "fifty-two million, five hundred thirty-seven thousand, seven hundred twenty-one".