55487447 has 2 divisors, whose sum is σ = 55487448. Its totient is φ = 55487446.

The previous prime is 55487441. The next prime is 55487479. The reversal of 55487447 is 74478455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55487447 - 2⁸ = 55487191 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55487398 and 55487407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55487441) 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, 27743723 + 27743724.

It is an arithmetic number, because the mean of its divisors is an integer number (27743724).

Almost surely, 2^55487447 is an apocalyptic number.

55487447 is a deficient number, since it is larger than the sum of its proper divisors (1).

55487447 is an equidigital number, since it uses as much as digits as its factorization.

55487447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 627200, while the sum is 44.

The square root of 55487447 is about 7448.9896630348. The cubic root of 55487447 is about 381.4154207530.

The spelling of 55487447 in words is "fifty-five million, four hundred eighty-seven thousand, four hundred forty-seven".