57002321 has 2 divisors, whose sum is σ = 57002322. Its totient is φ = 57002320.

The previous prime is 57002317. The next prime is 57002333. The reversal of 57002321 is 12320075.

57002321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49900096 + 7102225 = 7064^2 + 2665^2 .

It is a cyclic number.

It is not a de Polignac number, because 57002321 - 2² = 57002317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57002293 and 57002302.

It is not a weakly prime, because it can be changed into another prime (57002221) 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 as a sum of consecutive naturals, namely, 28501160 + 28501161.

It is an arithmetic number, because the mean of its divisors is an integer number (28501161).

Almost surely, 2^57002321 is an apocalyptic number.

It is an amenable number.

57002321 is a deficient number, since it is larger than the sum of its proper divisors (1).

57002321 is an equidigital number, since it uses as much as digits as its factorization.

57002321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 57002321 is about 7549.9881456861. The cubic root of 57002321 is about 384.8553366656.

Adding to 57002321 its reverse (12320075), we get a palindrome (69322396).

The spelling of 57002321 in words is "fifty-seven million, two thousand, three hundred twenty-one".