57144481 has 4 divisors (see below), whose sum is σ = 57561732. Its totient is φ = 56727232.

The previous prime is 57144467. The next prime is 57144491. The reversal of 57144481 is 18444175.

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 41216400 + 15928081 = 6420^2 + 3991^2 .

It is a cyclic number.

It is not a de Polignac number, because 57144481 - 2⁹ = 57143969 is a prime.

It is a super-2 number, since 2×57144481² = 6530983417518722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57144491) 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, 208420 + ... + 208693.

It is an arithmetic number, because the mean of its divisors is an integer number (14390433).

Almost surely, 2^57144481 is an apocalyptic number.

It is an amenable number.

57144481 is a deficient number, since it is larger than the sum of its proper divisors (417251).

57144481 is a wasteful number, since it uses less digits than its factorization.

57144481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417250.

The product of its digits is 17920, while the sum is 34.

The square root of 57144481 is about 7559.3968674756. The cubic root of 57144481 is about 385.1750056120.

The spelling of 57144481 in words is "fifty-seven million, one hundred forty-four thousand, four hundred eighty-one".