57057247 has 8 divisors (see below), whose sum is σ = 64680560. Its totient is φ = 49896000.

The previous prime is 57057241. The next prime is 57057251. The reversal of 57057247 is 74275075.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57057247 - 2¹⁵ = 57024479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57057241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115254 + ... + 115747.

It is an arithmetic number, because the mean of its divisors is an integer number (8085070).

Almost surely, 2^57057247 is an apocalyptic number.

57057247 is a deficient number, since it is larger than the sum of its proper divisors (7623313).

57057247 is a wasteful number, since it uses less digits than its factorization.

57057247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231033.

The product of its (nonzero) digits is 68600, while the sum is 37.

The square root of 57057247 is about 7553.6247590147. The cubic root of 57057247 is about 384.9789092849.

The spelling of 57057247 in words is "fifty-seven million, fifty-seven thousand, two hundred forty-seven".