55529209 has 2 divisors, whose sum is σ = 55529210. Its totient is φ = 55529208.

The previous prime is 55529203. The next prime is 55529263. The reversal of 55529209 is 90292555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55175184 + 354025 = 7428^2 + 595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55529209 is a prime.

It is not a weakly prime, because it can be changed into another prime (55529203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27764604 + 27764605.

It is an arithmetic number, because the mean of its divisors is an integer number (27764605).

Almost surely, 2^55529209 is an apocalyptic number.

It is an amenable number.

55529209 is a deficient number, since it is larger than the sum of its proper divisors (1).

55529209 is an equidigital number, since it uses as much as digits as its factorization.

55529209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 55529209 is about 7451.7923347340. The cubic root of 55529209 is about 381.5110860920.

The spelling of 55529209 in words is "fifty-five million, five hundred twenty-nine thousand, two hundred nine".