57043247 has 2 divisors, whose sum is σ = 57043248. Its totient is φ = 57043246.

The previous prime is 57043229. The next prime is 57043253. The reversal of 57043247 is 74234075.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57043247 - 2²⁰ = 55994671 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57048247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28521623 + 28521624.

It is an arithmetic number, because the mean of its divisors is an integer number (28521624).

Almost surely, 2^57043247 is an apocalyptic number.

57043247 is a deficient number, since it is larger than the sum of its proper divisors (1).

57043247 is an equidigital number, since it uses as much as digits as its factorization.

57043247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 57043247 is about 7552.6979947566. The cubic root of 57043247 is about 384.9474195917.

The spelling of 57043247 in words is "fifty-seven million, forty-three thousand, two hundred forty-seven".