57171140 has 24 divisors (see below), whose sum is σ = 129295320. Its totient is φ = 21109248.

The previous prime is 57171139. The next prime is 57171143. The reversal of 57171140 is 4117175.

It can be written as a sum of positive squares in 4 ways, for example, as 891136 + 56280004 = 944^2 + 7502^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

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 7 ways as a sum of consecutive naturals, for example, 109685 + ... + 110204.

It is an arithmetic number, because the mean of its divisors is an integer number (5387305).

Almost surely, 2^57171140 is an apocalyptic number.

It is an amenable number.

57171140 is an abundant number, since it is smaller than the sum of its proper divisors (72124180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57171140 is a wasteful number, since it uses less digits than its factorization.

57171140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219911 (or 219909 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 57171140 is about 7561.1599639209. The cubic root of 57171140 is about 385.2348934839.

The spelling of 57171140 in words is "fifty-seven million, one hundred seventy-one thousand, one hundred forty".