54771721 has 2 divisors, whose sum is σ = 54771722. Its totient is φ = 54771720.

The previous prime is 54771709. The next prime is 54771751. The reversal of 54771721 is 12717745.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34386496 + 20385225 = 5864^2 + 4515^2 .

It is a cyclic number.

It is not a de Polignac number, because 54771721 - 2¹⁹ = 54247433 is a prime.

It is not a weakly prime, because it can be changed into another prime (54771701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27385860 + 27385861.

It is an arithmetic number, because the mean of its divisors is an integer number (27385861).

Almost surely, 2^54771721 is an apocalyptic number.

It is an amenable number.

54771721 is a deficient number, since it is larger than the sum of its proper divisors (1).

54771721 is an equidigital number, since it uses as much as digits as its factorization.

54771721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13720, while the sum is 34.

The square root of 54771721 is about 7400.7919170856. The cubic root of 54771721 is about 379.7683745407.

The spelling of 54771721 in words is "fifty-four million, seven hundred seventy-one thousand, seven hundred twenty-one".