57240523 has 2 divisors, whose sum is σ = 57240524. Its totient is φ = 57240522.

The previous prime is 57240497. The next prime is 57240527. The reversal of 57240523 is 32504275.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57240523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57240491 and 57240500.

It is not a weakly prime, because it can be changed into another prime (57240527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28620261 + 28620262.

It is an arithmetic number, because the mean of its divisors is an integer number (28620262).

Almost surely, 2^57240523 is an apocalyptic number.

57240523 is a deficient number, since it is larger than the sum of its proper divisors (1).

57240523 is an equidigital number, since it uses as much as digits as its factorization.

57240523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 57240523 is about 7565.7466915038. The cubic root of 57240523 is about 385.3906710739.

Adding to 57240523 its reverse (32504275), we get a palindrome (89744798).

The spelling of 57240523 in words is "fifty-seven million, two hundred forty thousand, five hundred twenty-three".