55209593 has 2 divisors, whose sum is σ = 55209594. Its totient is φ = 55209592.

The previous prime is 55209589. The next prime is 55209607. The reversal of 55209593 is 39590255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53173264 + 2036329 = 7292^2 + 1427^2 .

It is a cyclic number.

It is not a de Polignac number, because 55209593 - 2² = 55209589 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55209503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27604796 + 27604797.

It is an arithmetic number, because the mean of its divisors is an integer number (27604797).

Almost surely, 2^55209593 is an apocalyptic number.

It is an amenable number.

55209593 is a deficient number, since it is larger than the sum of its proper divisors (1).

55209593 is an equidigital number, since it uses as much as digits as its factorization.

55209593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60750, while the sum is 38.

The square root of 55209593 is about 7430.3158075549. The cubic root of 55209593 is about 380.7777078118. Note that the first 4 decimals are identical.

The spelling of 55209593 in words is "fifty-five million, two hundred nine thousand, five hundred ninety-three".