56315321 has 2 divisors, whose sum is σ = 56315322. Its totient is φ = 56315320.

The previous prime is 56315279. The next prime is 56315327. The reversal of 56315321 is 12351365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54922921 + 1392400 = 7411^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 56315321 - 2¹⁴ = 56298937 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_3356072 and since 56315321 and 3356072 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (56315327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28157660 + 28157661.

It is an arithmetic number, because the mean of its divisors is an integer number (28157661).

Almost surely, 2^56315321 is an apocalyptic number.

It is an amenable number.

56315321 is a deficient number, since it is larger than the sum of its proper divisors (1).

56315321 is an equidigital number, since it uses as much as digits as its factorization.

56315321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 26.

The square root of 56315321 is about 7504.3534698200. The cubic root of 56315321 is about 383.3029731889.

Adding to 56315321 its reverse (12351365), we get a palindrome (68666686).

The spelling of 56315321 in words is "fifty-six million, three hundred fifteen thousand, three hundred twenty-one".