57824021 has 16 divisors (see below), whose sum is σ = 63825408. Its totient is φ = 52147200.

The previous prime is 57824009. The next prime is 57824051. The reversal of 57824021 is 12042875.

57824021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 57824021 - 2²² = 53629717 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 (57824051) 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 in 15 ways as a sum of consecutive naturals, for example, 59066 + ... + 60036.

It is an arithmetic number, because the mean of its divisors is an integer number (3989088).

Almost surely, 2^57824021 is an apocalyptic number.

It is an amenable number.

57824021 is a deficient number, since it is larger than the sum of its proper divisors (6001387).

57824021 is a wasteful number, since it uses less digits than its factorization.

57824021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 57824021 is about 7604.2107414248. The cubic root of 57824021 is about 386.6957772211.

Adding to 57824021 its reverse (12042875), we get a palindrome (69866896).

The spelling of 57824021 in words is "fifty-seven million, eight hundred twenty-four thousand, twenty-one".