53218603 has 2 divisors, whose sum is σ = 53218604. Its totient is φ = 53218602.

The previous prime is 53218597. The next prime is 53218643. The reversal of 53218603 is 30681235.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53218603 - 2⁹ = 53218091 is a prime.

It is not a weakly prime, because it can be changed into another prime (53218643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26609301 + 26609302.

It is an arithmetic number, because the mean of its divisors is an integer number (26609302).

Almost surely, 2^53218603 is an apocalyptic number.

53218603 is a deficient number, since it is larger than the sum of its proper divisors (1).

53218603 is an equidigital number, since it uses as much as digits as its factorization.

53218603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 53218603 is about 7295.1081554697. The cubic root of 53218603 is about 376.1443043322.

Adding to 53218603 its reverse (30681235), we get a palindrome (83899838).

It can be divided in two parts, 5321 and 8603, that added together give a square (13924 = 118²).

The spelling of 53218603 in words is "fifty-three million, two hundred eighteen thousand, six hundred three".