57711257 has 2 divisors, whose sum is σ = 57711258. Its totient is φ = 57711256.

The previous prime is 57711239. The next prime is 57711259. The reversal of 57711257 is 75211775.

It is a happy number.

57711257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57592921 + 118336 = 7589^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 57711257 - 2⁶ = 57711193 is a prime.

Together with 57711259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57711259) 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, 28855628 + 28855629.

It is an arithmetic number, because the mean of its divisors is an integer number (28855629).

Almost surely, 2^57711257 is an apocalyptic number.

It is an amenable number.

57711257 is a deficient number, since it is larger than the sum of its proper divisors (1).

57711257 is an equidigital number, since it uses as much as digits as its factorization.

57711257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17150, while the sum is 35.

The square root of 57711257 is about 7596.7925468582. The cubic root of 57711257 is about 386.4442454303. Note that the first 3 decimals are identical.

The spelling of 57711257 in words is "fifty-seven million, seven hundred eleven thousand, two hundred fifty-seven".