57310081 has 4 divisors (see below), whose sum is σ = 57395412. Its totient is φ = 57224752.

The previous prime is 57310073. The next prime is 57310091. The reversal of 57310081 is 18001375.

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 32718400 + 24591681 = 5720^2 + 4959^2 .

It is a cyclic number.

It is not a de Polignac number, because 57310081 - 2³ = 57310073 is a prime.

It is a super-2 number, since 2×57310081² = 6568890768453122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57310051) 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, 41650 + ... + 43003.

It is an arithmetic number, because the mean of its divisors is an integer number (14348853).

Almost surely, 2^57310081 is an apocalyptic number.

It is an amenable number.

57310081 is a deficient number, since it is larger than the sum of its proper divisors (85331).

57310081 is an equidigital number, since it uses as much as digits as its factorization.

57310081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85330.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 57310081 is about 7570.3421983422. The cubic root of 57310081 is about 385.5467152637.

The spelling of 57310081 in words is "fifty-seven million, three hundred ten thousand, eighty-one".