52216609 has 2 divisors, whose sum is σ = 52216610. Its totient is φ = 52216608.

The previous prime is 52216597. The next prime is 52216631. The reversal of 52216609 is 90661225.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52128400 + 88209 = 7220^2 + 297^2 .

It is a cyclic number.

It is not a de Polignac number, because 52216609 - 2¹³ = 52208417 is a prime.

It is not a weakly prime, because it can be changed into another prime (52216649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26108304 + 26108305.

It is an arithmetic number, because the mean of its divisors is an integer number (26108305).

Almost surely, 2^52216609 is an apocalyptic number.

It is an amenable number.

52216609 is a deficient number, since it is larger than the sum of its proper divisors (1).

52216609 is an equidigital number, since it uses as much as digits as its factorization.

52216609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 52216609 is about 7226.1060745051. The cubic root of 52216609 is about 373.7686640717.

It can be divided in two parts, 52216 and 609, that added together give a palindrome (52825).

The spelling of 52216609 in words is "fifty-two million, two hundred sixteen thousand, six hundred nine".