54585721 has 2 divisors, whose sum is σ = 54585722. Its totient is φ = 54585720.

The previous prime is 54585709. The next prime is 54585757. The reversal of 54585721 is 12758545.

54585721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37454400 + 17131321 = 6120^2 + 4139^2 .

It is a cyclic number.

It is not a de Polignac number, because 54585721 - 2⁷ = 54585593 is a prime.

It is not a weakly prime, because it can be changed into another prime (54585701) 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, 27292860 + 27292861.

It is an arithmetic number, because the mean of its divisors is an integer number (27292861).

Almost surely, 2^54585721 is an apocalyptic number.

It is an amenable number.

54585721 is a deficient number, since it is larger than the sum of its proper divisors (1).

54585721 is an equidigital number, since it uses as much as digits as its factorization.

54585721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56000, while the sum is 37.

The square root of 54585721 is about 7388.2150076998. The cubic root of 54585721 is about 379.3380002130.

The spelling of 54585721 in words is "fifty-four million, five hundred eighty-five thousand, seven hundred twenty-one".