52545421 has 2 divisors, whose sum is σ = 52545422. Its totient is φ = 52545420.

The previous prime is 52545397. The next prime is 52545491. The reversal of 52545421 is 12454525.

52545421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27405225 + 25140196 = 5235^2 + 5014^2 .

It is a cyclic number.

It is not a de Polignac number, because 52545421 - 2⁷ = 52545293 is a prime.

It is a super-2 number, since 2×52545421² = 5522042536134482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52545421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52545491) 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, 26272710 + 26272711.

It is an arithmetic number, because the mean of its divisors is an integer number (26272711).

Almost surely, 2^52545421 is an apocalyptic number.

It is an amenable number.

52545421 is a deficient number, since it is larger than the sum of its proper divisors (1).

52545421 is an equidigital number, since it uses as much as digits as its factorization.

52545421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8000, while the sum is 28.

The square root of 52545421 is about 7248.8220422356. The cubic root of 52545421 is about 374.5515730194.

Adding to 52545421 its reverse (12454525), we get a palindrome (64999946).

The spelling of 52545421 in words is "fifty-two million, five hundred forty-five thousand, four hundred twenty-one".