55111139 has 2 divisors, whose sum is σ = 55111140. Its totient is φ = 55111138.

The previous prime is 55111073. The next prime is 55111141. The reversal of 55111139 is 93111155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55111139 - 2⁸ = 55110883 is a prime.

Together with 55111141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55111159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27555569 + 27555570.

It is an arithmetic number, because the mean of its divisors is an integer number (27555570).

Almost surely, 2^55111139 is an apocalyptic number.

55111139 is a deficient number, since it is larger than the sum of its proper divisors (1).

55111139 is an equidigital number, since it uses as much as digits as its factorization.

55111139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 675, while the sum is 26.

The square root of 55111139 is about 7423.6876954786. The cubic root of 55111139 is about 380.5512290847.

The spelling of 55111139 in words is "fifty-five million, one hundred eleven thousand, one hundred thirty-nine".