57112321 has 8 divisors (see below), whose sum is σ = 65345024. Its totient is φ = 48898080.

The previous prime is 57112313. The next prime is 57112331. The reversal of 57112321 is 12321175.

It is a happy number.

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

It is not a de Polignac number, because 57112321 - 2³ = 57112313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57112292 and 57112301.

It is not an unprimeable number, because it can be changed into a prime (57112331) 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, 2821 + ... + 11053.

It is an arithmetic number, because the mean of its divisors is an integer number (8168128).

Almost surely, 2^57112321 is an apocalyptic number.

It is an amenable number.

57112321 is a deficient number, since it is larger than the sum of its proper divisors (8232703).

57112321 is an equidigital number, since it uses as much as digits as its factorization.

57112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9231.

The product of its digits is 420, while the sum is 22.

The square root of 57112321 is about 7557.2694142792. The cubic root of 57112321 is about 385.1027352750.

Adding to 57112321 its reverse (12321175), we get a palindrome (69433496).

It can be divided in two parts, 5711 and 2321, that multiplied together give a palindrome (13255231).

The spelling of 57112321 in words is "fifty-seven million, one hundred twelve thousand, three hundred twenty-one".