57097321 has 4 divisors (see below), whose sum is σ = 57174912. Its totient is φ = 57019732.

The previous prime is 57097303. The next prime is 57097331. The reversal of 57097321 is 12379075.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57097321 - 2¹⁷ = 56966249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57097301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37681 + ... + 39166.

It is an arithmetic number, because the mean of its divisors is an integer number (14293728).

Almost surely, 2^57097321 is an apocalyptic number.

It is an amenable number.

57097321 is a deficient number, since it is larger than the sum of its proper divisors (77591).

57097321 is an equidigital number, since it uses as much as digits as its factorization.

57097321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77590.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 57097321 is about 7556.2769271646. The cubic root of 57097321 is about 385.0690178172.

The spelling of 57097321 in words is "fifty-seven million, ninety-seven thousand, three hundred twenty-one".