57724081 has 2 divisors, whose sum is σ = 57724082. Its totient is φ = 57724080.

The previous prime is 57724031. The next prime is 57724087. The reversal of 57724081 is 18042775.

It is a happy number.

57724081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57517056 + 207025 = 7584^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 57724081 - 2¹¹ = 57722033 is a prime.

It is a super-2 number, since 2×57724081² = 6664139054589122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57724087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28862040 + 28862041.

It is an arithmetic number, because the mean of its divisors is an integer number (28862041).

Almost surely, 2^57724081 is an apocalyptic number.

It is an amenable number.

57724081 is a deficient number, since it is larger than the sum of its proper divisors (1).

57724081 is an equidigital number, since it uses as much as digits as its factorization.

57724081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 57724081 is about 7597.6365403986. The cubic root of 57724081 is about 386.4728671945.

It can be divided in two parts, 5772 and 4081, that multiplied together give a palindrome (23555532).

The spelling of 57724081 in words is "fifty-seven million, seven hundred twenty-four thousand, eighty-one".