53218553 has 2 divisors, whose sum is σ = 53218554. Its totient is φ = 53218552.

The previous prime is 53218549. The next prime is 53218577. The reversal of 53218553 is 35581235.

53218553 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., 44049769 + 9168784 = 6637^2 + 3028^2 .

It is a cyclic number.

It is not a de Polignac number, because 53218553 - 2² = 53218549 is a prime.

It is not a weakly prime, because it can be changed into another prime (53218453) 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, 26609276 + 26609277.

It is an arithmetic number, because the mean of its divisors is an integer number (26609277).

Almost surely, 2^53218553 is an apocalyptic number.

It is an amenable number.

53218553 is a deficient number, since it is larger than the sum of its proper divisors (1).

53218553 is an equidigital number, since it uses as much as digits as its factorization.

53218553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 32.

The square root of 53218553 is about 7295.1047285149. The cubic root of 53218553 is about 376.1441865337.

Adding to 53218553 its reverse (35581235), we get a palindrome (88799788).

The spelling of 53218553 in words is "fifty-three million, two hundred eighteen thousand, five hundred fifty-three".