4056431321 has 2 divisors, whose sum is σ = 4056431322. Its totient is φ = 4056431320.

The previous prime is 4056431287. The next prime is 4056431329. The reversal of 4056431321 is 1231346504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3715512025 + 340919296 = 60955^2 + 18464^2 .

It is a cyclic number.

It is not a de Polignac number, because 4056431321 - 2⁶ = 4056431257 is a prime.

It is not a weakly prime, because it can be changed into another prime (4056431329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2028215660 + 2028215661.

It is an arithmetic number, because the mean of its divisors is an integer number (2028215661).

Almost surely, 2^4056431321 is an apocalyptic number.

It is an amenable number.

4056431321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4056431321 is an equidigital number, since it uses as much as digits as its factorization.

4056431321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 4056431321 is about 63690.1194927439. The cubic root of 4056431321 is about 1594.8311480927.

Adding to 4056431321 its reverse (1231346504), we get a palindrome (5287777825).

The spelling of 4056431321 in words is "four billion, fifty-six million, four hundred thirty-one thousand, three hundred twenty-one".