56242321 has 2 divisors, whose sum is σ = 56242322. Its totient is φ = 56242320.

The previous prime is 56242309. The next prime is 56242327. The reversal of 56242321 is 12324265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55056400 + 1185921 = 7420^2 + 1089^2 .

It is a cyclic number.

It is not a de Polignac number, because 56242321 - 2⁵ = 56242289 is a prime.

It is not a weakly prime, because it can be changed into another prime (56242327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28121160 + 28121161.

It is an arithmetic number, because the mean of its divisors is an integer number (28121161).

Almost surely, 2^56242321 is an apocalyptic number.

It is an amenable number.

56242321 is a deficient number, since it is larger than the sum of its proper divisors (1).

56242321 is an equidigital number, since it uses as much as digits as its factorization.

56242321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 56242321 is about 7499.4880491938. The cubic root of 56242321 is about 383.1372798770.

Adding to 56242321 its reverse (12324265), we get a palindrome (68566586).

The spelling of 56242321 in words is "fifty-six million, two hundred forty-two thousand, three hundred twenty-one".