55087817 has 2 divisors, whose sum is σ = 55087818. Its totient is φ = 55087816.

The previous prime is 55087793. The next prime is 55087831. The reversal of 55087817 is 71878055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36675136 + 18412681 = 6056^2 + 4291^2 .

It is a cyclic number.

It is not a de Polignac number, because 55087817 - 2¹⁰ = 55086793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55057817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27543908 + 27543909.

It is an arithmetic number, because the mean of its divisors is an integer number (27543909).

Almost surely, 2^55087817 is an apocalyptic number.

It is an amenable number.

55087817 is a deficient number, since it is larger than the sum of its proper divisors (1).

55087817 is an equidigital number, since it uses as much as digits as its factorization.

55087817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78400, while the sum is 41.

The square root of 55087817 is about 7422.1167465892. The cubic root of 55087817 is about 380.4975407974.

The spelling of 55087817 in words is "fifty-five million, eighty-seven thousand, eight hundred seventeen".