57573721 has 2 divisors, whose sum is σ = 57573722. Its totient is φ = 57573720.

The previous prime is 57573683. The next prime is 57573767. The reversal of 57573721 is 12737575.

57573721 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., 52998400 + 4575321 = 7280^2 + 2139^2 .

It is a cyclic number.

It is not a de Polignac number, because 57573721 - 2¹⁵ = 57540953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57573521) 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, 28786860 + 28786861.

It is an arithmetic number, because the mean of its divisors is an integer number (28786861).

Almost surely, 2^57573721 is an apocalyptic number.

It is an amenable number.

57573721 is a deficient number, since it is larger than the sum of its proper divisors (1).

57573721 is an equidigital number, since it uses as much as digits as its factorization.

57573721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51450, while the sum is 37.

The square root of 57573721 is about 7587.7349057542. The cubic root of 57573721 is about 386.1370132056.

The spelling of 57573721 in words is "fifty-seven million, five hundred seventy-three thousand, seven hundred twenty-one".