56144321 has 2 divisors, whose sum is σ = 56144322. Its totient is φ = 56144320.

The previous prime is 56144303. The next prime is 56144327. The reversal of 56144321 is 12344165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54184321 + 1960000 = 7361^2 + 1400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56144321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56144327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28072160 + 28072161.

It is an arithmetic number, because the mean of its divisors is an integer number (28072161).

Almost surely, 2^56144321 is an apocalyptic number.

It is an amenable number.

56144321 is a deficient number, since it is larger than the sum of its proper divisors (1).

56144321 is an equidigital number, since it uses as much as digits as its factorization.

56144321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 56144321 is about 7492.9514211691. The cubic root of 56144321 is about 382.9146166926.

Adding to 56144321 its reverse (12344165), we get a palindrome (68488486).

It can be divided in two parts, 56144 and 321, that added together give a palindrome (56465).

The spelling of 56144321 in words is "fifty-six million, one hundred forty-four thousand, three hundred twenty-one".