55271591 has 2 divisors, whose sum is σ = 55271592. Its totient is φ = 55271590.

The previous prime is 55271569. The next prime is 55271603. The reversal of 55271591 is 19517255.

55271591 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-55271591 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55271501) 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, 27635795 + 27635796.

It is an arithmetic number, because the mean of its divisors is an integer number (27635796).

Almost surely, 2^55271591 is an apocalyptic number.

55271591 is a deficient number, since it is larger than the sum of its proper divisors (1).

55271591 is an equidigital number, since it uses as much as digits as its factorization.

55271591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15750, while the sum is 35.

The square root of 55271591 is about 7434.4865996248. The cubic root of 55271591 is about 380.9201868257.

The spelling of 55271591 in words is "fifty-five million, two hundred seventy-one thousand, five hundred ninety-one".