55555539 has 16 divisors (see below), whose sum is σ = 80253600. Its totient is φ = 34183968.

The previous prime is 55555531. The next prime is 55555543. The reversal of 55555539 is 93555555.

It is not a de Polignac number, because 55555539 - 2³ = 55555531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55555539.

It is not an unprimeable number, because it can be changed into a prime (55555531) 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 in 15 ways as a sum of consecutive naturals, for example, 2377 + ... + 10805.

It is an arithmetic number, because the mean of its divisors is an integer number (5015850).

Almost surely, 2^55555539 is an apocalyptic number.

55555539 is a deficient number, since it is larger than the sum of its proper divisors (24698061).

55555539 is an equidigital number, since it uses as much as digits as its factorization.

55555539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8471 (or 8445 counting only the distinct ones).

The product of its digits is 421875, while the sum is 42.

The square root of 55555539 is about 7453.5588144188. The cubic root of 55555539 is about 381.5713762817.

The spelling of 55555539 in words is "fifty-five million, five hundred fifty-five thousand, five hundred thirty-nine".