57171147 has 16 divisors (see below), whose sum is σ = 84163968. Its totient is φ = 34230080.

The previous prime is 57171143. The next prime is 57171181. The reversal of 57171147 is 74117175.

It is a cyclic number.

It is not a de Polignac number, because 57171147 - 2² = 57171143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (57171143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7698 + ... + 13175.

It is an arithmetic number, because the mean of its divisors is an integer number (5260248).

Almost surely, 2^57171147 is an apocalyptic number.

57171147 is a deficient number, since it is larger than the sum of its proper divisors (26992821).

57171147 is a wasteful number, since it uses less digits than its factorization.

57171147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20970.

The product of its digits is 6860, while the sum is 33.

The square root of 57171147 is about 7561.1604268128. The cubic root of 57171147 is about 385.2349092066.

The spelling of 57171147 in words is "fifty-seven million, one hundred seventy-one thousand, one hundred forty-seven".