57500081 has 8 divisors (see below), whose sum is σ = 59023944. Its totient is φ = 55982080.

The previous prime is 57500063. The next prime is 57500089. The reversal of 57500081 is 18000575.

It can be written as a sum of positive squares in 4 ways, for example, as 43681 + 57456400 = 209^2 + 7580^2 .

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 57500081 - 2⁶ = 57500017 is a prime.

It is a super-2 number, since 2×57500081² = 6612518630013122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57500081.

It is not an unprimeable number, because it can be changed into a prime (57500089) 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, 24161 + ... + 26433.

It is an arithmetic number, because the mean of its divisors is an integer number (7377993).

Almost surely, 2^57500081 is an apocalyptic number.

It is an amenable number.

57500081 is a deficient number, since it is larger than the sum of its proper divisors (1523863).

57500081 is a wasteful number, since it uses less digits than its factorization.

57500081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 57500081 is about 7582.8807850315. The cubic root of 57500081 is about 385.9723127071.

The spelling of 57500081 in words is "fifty-seven million, five hundred thousand, eighty-one".