55332139 has 2 divisors, whose sum is σ = 55332140. Its totient is φ = 55332138.

The previous prime is 55332103. The next prime is 55332157. The reversal of 55332139 is 93123355.

55332139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55332139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55332139.

It is not a weakly prime, because it can be changed into another prime (55332239) 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, 27666069 + 27666070.

It is an arithmetic number, because the mean of its divisors is an integer number (27666070).

Almost surely, 2^55332139 is an apocalyptic number.

55332139 is a deficient number, since it is larger than the sum of its proper divisors (1).

55332139 is an equidigital number, since it uses as much as digits as its factorization.

55332139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12150, while the sum is 31.

The square root of 55332139 is about 7438.5575886727. The cubic root of 55332139 is about 381.0592307618.

The spelling of 55332139 in words is "fifty-five million, three hundred thirty-two thousand, one hundred thirty-nine".