55995139 has 2 divisors, whose sum is σ = 55995140. Its totient is φ = 55995138.

The previous prime is 55995131. The next prime is 55995157. The reversal of 55995139 is 93159955.

55995139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55995139 - 2³ = 55995131 is a prime.

It is not a weakly prime, because it can be changed into another prime (55995131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27997569 + 27997570.

It is an arithmetic number, because the mean of its divisors is an integer number (27997570).

Almost surely, 2^55995139 is an apocalyptic number.

55995139 is a deficient number, since it is larger than the sum of its proper divisors (1).

55995139 is an equidigital number, since it uses as much as digits as its factorization.

55995139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 273375, while the sum is 46.

The square root of 55995139 is about 7482.9899772751. The cubic root of 55995139 is about 382.5751662836.

The spelling of 55995139 in words is "fifty-five million, nine hundred ninety-five thousand, one hundred thirty-nine".