55277009 has 2 divisors, whose sum is σ = 55277010. Its totient is φ = 55277008.

The previous prime is 55277003. The next prime is 55277021. The reversal of 55277009 is 90077255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46444225 + 8832784 = 6815^2 + 2972^2 .

It is a cyclic number.

It is not a de Polignac number, because 55277009 - 2¹² = 55272913 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55277009.

It is not a weakly prime, because it can be changed into another prime (55277003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27638504 + 27638505.

It is an arithmetic number, because the mean of its divisors is an integer number (27638505).

Almost surely, 2^55277009 is an apocalyptic number.

It is an amenable number.

55277009 is a deficient number, since it is larger than the sum of its proper divisors (1).

55277009 is an equidigital number, since it uses as much as digits as its factorization.

55277009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22050, while the sum is 35.

The square root of 55277009 is about 7434.8509736242. The cubic root of 55277009 is about 380.9326329914.

The spelling of 55277009 in words is "fifty-five million, two hundred seventy-seven thousand, nine".