57005921 has 8 divisors (see below), whose sum is σ = 65195904. Its totient is φ = 48827520.

The previous prime is 57005911. The next prime is 57005929. The reversal of 57005921 is 12950075.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-57005921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57005929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15281 + ... + 18641.

It is an arithmetic number, because the mean of its divisors is an integer number (8149488).

Almost surely, 2^57005921 is an apocalyptic number.

It is an amenable number.

57005921 is a deficient number, since it is larger than the sum of its proper divisors (8189983).

57005921 is a wasteful number, since it uses less digits than its factorization.

57005921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5791.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 57005921 is about 7550.2265528923. The cubic root of 57005921 is about 384.8634383828.

Adding to 57005921 its reverse (12950075), we get a palindrome (69955996).

The spelling of 57005921 in words is "fifty-seven million, five thousand, nine hundred twenty-one".