57243247 has 2 divisors, whose sum is σ = 57243248. Its totient is φ = 57243246.

The previous prime is 57243239. The next prime is 57243269. The reversal of 57243247 is 74234275.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57243247 - 2³ = 57243239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57243217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28621623 + 28621624.

It is an arithmetic number, because the mean of its divisors is an integer number (28621624).

Almost surely, 2^57243247 is an apocalyptic number.

57243247 is a deficient number, since it is larger than the sum of its proper divisors (1).

57243247 is an equidigital number, since it uses as much as digits as its factorization.

57243247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 34.

The square root of 57243247 is about 7565.9267112496. The cubic root of 57243247 is about 385.3967843859.

The spelling of 57243247 in words is "fifty-seven million, two hundred forty-three thousand, two hundred forty-seven".