55291 has 2 divisors, whose sum is σ = 55292. Its totient is φ = 55290.

The previous prime is 55259. The next prime is 55313. The reversal of 55291 is 19255.

It is an a-pointer prime, because the next prime (55313) can be obtained adding 55291 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55291 - 2⁵ = 55259 is a prime.

It is not a weakly prime, because it can be changed into another prime (55201) 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, 27645 + 27646.

It is an arithmetic number, because the mean of its divisors is an integer number (27646).

2⁵⁵²⁹¹ is an apocalyptic number.

55291 is a deficient number, since it is larger than the sum of its proper divisors (1).

55291 is an equidigital number, since it uses as much as digits as its factorization.

55291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 450, while the sum is 22.

The square root of 55291 is about 235.1403836009. The cubic root of 55291 is about 38.0964769190.

The spelling of 55291 in words is "fifty-five thousand, two hundred ninety-one".