57130056 has 64 divisors (see below), whose sum is σ = 162590400. Its totient is φ = 18576000.

The previous prime is 57130009. The next prime is 57130103. The reversal of 57130056 is 65003175.

It is an interprime number because it is at equal distance from previous prime (57130009) and next prime (57130103).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5631 + ... + 12081.

It is an arithmetic number, because the mean of its divisors is an integer number (2540475).

Almost surely, 2^57130056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57130056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81295200).

57130056 is an abundant number, since it is smaller than the sum of its proper divisors (105460344).

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

57130056 is a wasteful number, since it uses less digits than its factorization.

57130056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6507 (or 6497 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 57130056 is about 7558.4426967465. The cubic root of 57130056 is about 385.1425929337.

The spelling of 57130056 in words is "fifty-seven million, one hundred thirty thousand, fifty-six".