55115773 has 2 divisors, whose sum is σ = 55115774. Its totient is φ = 55115772.

The previous prime is 55115743. The next prime is 55115783. The reversal of 55115773 is 37751155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54804409 + 311364 = 7403^2 + 558^2 .

It is a cyclic number.

It is not a de Polignac number, because 55115773 - 2⁹ = 55115261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55115743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27557886 + 27557887.

It is an arithmetic number, because the mean of its divisors is an integer number (27557887).

Almost surely, 2^55115773 is an apocalyptic number.

It is an amenable number.

55115773 is a deficient number, since it is larger than the sum of its proper divisors (1).

55115773 is an equidigital number, since it uses as much as digits as its factorization.

55115773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18375, while the sum is 34.

The square root of 55115773 is about 7423.9997979526. Note that the first 3 decimals coincide. The cubic root of 55115773 is about 380.5618949562.

The spelling of 55115773 in words is "fifty-five million, one hundred fifteen thousand, seven hundred seventy-three".