55138271 has 2 divisors, whose sum is σ = 55138272. Its totient is φ = 55138270.

The previous prime is 55138267. The next prime is 55138289. The reversal of 55138271 is 17283155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55138271 - 2² = 55138267 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55138201) 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 as a sum of consecutive naturals, namely, 27569135 + 27569136.

It is an arithmetic number, because the mean of its divisors is an integer number (27569136).

Almost surely, 2^55138271 is an apocalyptic number.

55138271 is a deficient number, since it is larger than the sum of its proper divisors (1).

55138271 is an equidigital number, since it uses as much as digits as its factorization.

55138271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 32.

The square root of 55138271 is about 7425.5148643040. The cubic root of 55138271 is about 380.6136691056.

The spelling of 55138271 in words is "fifty-five million, one hundred thirty-eight thousand, two hundred seventy-one".