57481685 has 4 divisors (see below), whose sum is σ = 68978028. Its totient is φ = 45985344.

The previous prime is 57481681. The next prime is 57481691. The reversal of 57481685 is 58618475.

It is a happy number.

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 22648081 + 34833604 = 4759^2 + 5902^2 .

It is a cyclic number.

It is not a de Polignac number, because 57481685 - 2² = 57481681 is a prime.

It is a super-2 number, since 2×57481685² = 6608288220878450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57481681) 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, 5748164 + ... + 5748173.

It is an arithmetic number, because the mean of its divisors is an integer number (17244507).

Almost surely, 2^57481685 is an apocalyptic number.

It is an amenable number.

57481685 is a deficient number, since it is larger than the sum of its proper divisors (11496343).

57481685 is a wasteful number, since it uses less digits than its factorization.

57481685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11496342.

The product of its digits is 268800, while the sum is 44.

The square root of 57481685 is about 7581.6676925331. The cubic root of 57481685 is about 385.9311469448.

The spelling of 57481685 in words is "fifty-seven million, four hundred eighty-one thousand, six hundred eighty-five".