54728561 has 2 divisors, whose sum is σ = 54728562. Its totient is φ = 54728560.

The previous prime is 54728543. The next prime is 54728581. The reversal of 54728561 is 16582745.

54728561 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., 43970161 + 10758400 = 6631^2 + 3280^2 .

It is a cyclic number.

It is not a de Polignac number, because 54728561 - 2⁶ = 54728497 is a prime.

It is not a weakly prime, because it can be changed into another prime (54728581) 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, 27364280 + 27364281.

It is an arithmetic number, because the mean of its divisors is an integer number (27364281).

Almost surely, 2^54728561 is an apocalyptic number.

It is an amenable number.

54728561 is a deficient number, since it is larger than the sum of its proper divisors (1).

54728561 is an equidigital number, since it uses as much as digits as its factorization.

54728561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 38.

The square root of 54728561 is about 7397.8754382593. The cubic root of 54728561 is about 379.6685961031.

The spelling of 54728561 in words is "fifty-four million, seven hundred twenty-eight thousand, five hundred sixty-one".