57443013 has 14 divisors (see below), whose sum is σ = 86126214. Its totient is φ = 38294856.

The previous prime is 57442999. The next prime is 57443027. The reversal of 57443013 is 31034475.

It is an interprime number because it is at equal distance from previous prime (57442999) and next prime (57443027).

It can be written as a sum of positive squares in only one way, i.e., 54730404 + 2712609 = 7398^2 + 1647^2 .

It is not a de Polignac number, because 57443013 - 2⁹ = 57442501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57443413) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 38670 + ... + 40127.

Almost surely, 2^57443013 is an apocalyptic number.

It is an amenable number.

57443013 is a deficient number, since it is larger than the sum of its proper divisors (28683201).

57443013 is an frugal number, since it uses more digits than its factorization.

57443013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78815 (or 78800 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 57443013 is about 7579.1169010644. The cubic root of 57443013 is about 385.8445797913.

Adding to 57443013 its reverse (31034475), we get a palindrome (88477488).

The spelling of 57443013 in words is "fifty-seven million, four hundred forty-three thousand, thirteen".