57521423 has 2 divisors, whose sum is σ = 57521424. Its totient is φ = 57521422.

The previous prime is 57521411. The next prime is 57521441. The reversal of 57521423 is 32412575.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57521423 - 2¹⁶ = 57455887 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57521473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28760711 + 28760712.

It is an arithmetic number, because the mean of its divisors is an integer number (28760712).

Almost surely, 2^57521423 is an apocalyptic number.

57521423 is a deficient number, since it is larger than the sum of its proper divisors (1).

57521423 is an equidigital number, since it uses as much as digits as its factorization.

57521423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 29.

The square root of 57521423 is about 7584.2879032906. The cubic root of 57521423 is about 386.0200598987.

Adding to 57521423 its reverse (32412575), we get a palindrome (89933998).

The spelling of 57521423 in words is "fifty-seven million, five hundred twenty-one thousand, four hundred twenty-three".