55283209 has 2 divisors, whose sum is σ = 55283210. Its totient is φ = 55283208.

The previous prime is 55283203. The next prime is 55283257. The reversal of 55283209 is 90238255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45265984 + 10017225 = 6728^2 + 3165^2 .

It is a cyclic number.

It is not a de Polignac number, because 55283209 - 2⁹ = 55282697 is a prime.

It is not a weakly prime, because it can be changed into another prime (55283203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27641604 + 27641605.

It is an arithmetic number, because the mean of its divisors is an integer number (27641605).

Almost surely, 2^55283209 is an apocalyptic number.

It is an amenable number.

55283209 is a deficient number, since it is larger than the sum of its proper divisors (1).

55283209 is an equidigital number, since it uses as much as digits as its factorization.

55283209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 55283209 is about 7435.2679171634. The cubic root of 55283209 is about 380.9468745605.

The spelling of 55283209 in words is "fifty-five million, two hundred eighty-three thousand, two hundred nine".