57223709 has 2 divisors, whose sum is σ = 57223710. Its totient is φ = 57223708.

The previous prime is 57223697. The next prime is 57223723. The reversal of 57223709 is 90732275.

57223709 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., 29398084 + 27825625 = 5422^2 + 5275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57223709 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57223909) 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, 28611854 + 28611855.

It is an arithmetic number, because the mean of its divisors is an integer number (28611855).

Almost surely, 2^57223709 is an apocalyptic number.

It is an amenable number.

57223709 is a deficient number, since it is larger than the sum of its proper divisors (1).

57223709 is an equidigital number, since it uses as much as digits as its factorization.

57223709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 57223709 is about 7564.6354175201. The cubic root of 57223709 is about 385.3529321145.

The spelling of 57223709 in words is "fifty-seven million, two hundred twenty-three thousand, seven hundred nine".