57100081 has 4 divisors (see below), whose sum is σ = 57240100. Its totient is φ = 56960064.

The previous prime is 57100079. The next prime is 57100091. The reversal of 57100081 is 18000175.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53802225 + 3297856 = 7335^2 + 1816^2 .

It is a cyclic number.

It is not a de Polignac number, because 57100081 - 2¹ = 57100079 is a prime.

It is a super-2 number, since 2×57100081² = 6520838500413122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57100031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69396 + ... + 70213.

It is an arithmetic number, because the mean of its divisors is an integer number (14310025).

Almost surely, 2^57100081 is an apocalyptic number.

It is an amenable number.

57100081 is a deficient number, since it is larger than the sum of its proper divisors (140019).

57100081 is a wasteful number, since it uses less digits than its factorization.

57100081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140018.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 57100081 is about 7556.4595545798. The cubic root of 57100081 is about 385.0752222727.

The spelling of 57100081 in words is "fifty-seven million, one hundred thousand, eighty-one".