57116021 has 8 divisors (see below), whose sum is σ = 58320000. Its totient is φ = 55923280.

The previous prime is 57116009. The next prime is 57116023. The reversal of 57116021 is 12061175.

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

It is a cyclic number.

It is not a de Polignac number, because 57116021 - 2¹⁰ = 57114997 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 (57116023) 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, 7880 + ... + 13278.

It is an arithmetic number, because the mean of its divisors is an integer number (7290000).

Almost surely, 2^57116021 is an apocalyptic number.

It is an amenable number.

57116021 is a deficient number, since it is larger than the sum of its proper divisors (1203979).

57116021 is a wasteful number, since it uses less digits than its factorization.

57116021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5619.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 57116021 is about 7557.5142077273. The cubic root of 57116021 is about 385.1110513402. Note that the first 3 decimals are identical.

Adding to 57116021 its reverse (12061175), we get a palindrome (69177196).

The spelling of 57116021 in words is "fifty-seven million, one hundred sixteen thousand, twenty-one".