55588387 has 2 divisors, whose sum is σ = 55588388. Its totient is φ = 55588386.

The previous prime is 55588381. The next prime is 55588483. The reversal of 55588387 is 78388555.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55588387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55588387.

It is not a weakly prime, because it can be changed into another prime (55588381) 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, 27794193 + 27794194.

It is an arithmetic number, because the mean of its divisors is an integer number (27794194).

Almost surely, 2^55588387 is an apocalyptic number.

55588387 is a deficient number, since it is larger than the sum of its proper divisors (1).

55588387 is an equidigital number, since it uses as much as digits as its factorization.

55588387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344000, while the sum is 49.

The square root of 55588387 is about 7455.7619999568. The cubic root of 55588387 is about 381.6465646267.

The spelling of 55588387 in words is "fifty-five million, five hundred eighty-eight thousand, three hundred eighty-seven".