55971583 has 2 divisors, whose sum is σ = 55971584. Its totient is φ = 55971582.

The previous prime is 55971571. The next prime is 55971611. The reversal of 55971583 is 38517955.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55971583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55971563) 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, 27985791 + 27985792.

It is an arithmetic number, because the mean of its divisors is an integer number (27985792).

Almost surely, 2^55971583 is an apocalyptic number.

55971583 is a deficient number, since it is larger than the sum of its proper divisors (1).

55971583 is an equidigital number, since it uses as much as digits as its factorization.

55971583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189000, while the sum is 43.

The square root of 55971583 is about 7481.4158419379. The cubic root of 55971583 is about 382.5215115986.

The spelling of 55971583 in words is "fifty-five million, nine hundred seventy-one thousand, five hundred eighty-three".