431444441 has 2 divisors, whose sum is σ = 431444442. Its totient is φ = 431444440.

The previous prime is 431444393. The next prime is 431444449. The reversal of 431444441 is 144444134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 431434441 + 10000 = 20771^2 + 100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431444441 is a prime.

It is a super-2 number, since 2×431444441² = 372288611339604962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (431444449) 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, 215722220 + 215722221.

It is an arithmetic number, because the mean of its divisors is an integer number (215722221).

Almost surely, 2^431444441 is an apocalyptic number.

It is an amenable number.

431444441 is a deficient number, since it is larger than the sum of its proper divisors (1).

431444441 is an equidigital number, since it uses as much as digits as its factorization.

431444441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 29.

The square root of 431444441 is about 20771.2407188401. The cubic root of 431444441 is about 755.6284351468.

Adding to 431444441 its reverse (144444134), we get a palindrome (575888575).

The spelling of 431444441 in words is "four hundred thirty-one million, four hundred forty-four thousand, four hundred forty-one".