57240503 has 4 divisors (see below), whose sum is σ = 57330168. Its totient is φ = 57150840.

The previous prime is 57240497. The next prime is 57240523. The reversal of 57240503 is 30504275.

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

It is a cyclic number.

It is not a de Polignac number, because 57240503 - 2⁴ = 57240487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57240523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43868 + ... + 45153.

It is an arithmetic number, because the mean of its divisors is an integer number (14332542).

Almost surely, 2^57240503 is an apocalyptic number.

57240503 is a deficient number, since it is larger than the sum of its proper divisors (89665).

57240503 is an equidigital number, since it uses as much as digits as its factorization.

57240503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89664.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 57240503 is about 7565.7453697570. The cubic root of 57240503 is about 385.3906261884.

Adding to 57240503 its reverse (30504275), we get a palindrome (87744778).

The spelling of 57240503 in words is "fifty-seven million, two hundred forty thousand, five hundred three".