53421553 has 2 divisors, whose sum is σ = 53421554. Its totient is φ = 53421552.

The previous prime is 53421547. The next prime is 53421583. The reversal of 53421553 is 35512435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47983329 + 5438224 = 6927^2 + 2332^2 .

It is a cyclic number.

It is not a de Polignac number, because 53421553 - 2¹³ = 53413361 is a prime.

It is not a weakly prime, because it can be changed into another prime (53421503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26710776 + 26710777.

It is an arithmetic number, because the mean of its divisors is an integer number (26710777).

Almost surely, 2^53421553 is an apocalyptic number.

It is an amenable number.

53421553 is a deficient number, since it is larger than the sum of its proper divisors (1).

53421553 is an equidigital number, since it uses as much as digits as its factorization.

53421553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 28.

The square root of 53421553 is about 7309.0049254327. The cubic root of 53421553 is about 376.6218419349.

Adding to 53421553 its reverse (35512435), we get a palindrome (88933988).

The spelling of 53421553 in words is "fifty-three million, four hundred twenty-one thousand, five hundred fifty-three".