431404433321 has 2 divisors, whose sum is σ = 431404433322. Its totient is φ = 431404433320.

The previous prime is 431404433311. The next prime is 431404433381. The reversal of 431404433321 is 123334404134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401656807696 + 29747625625 = 633764^2 + 172475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431404433321 is a prime.

It is a super-2 number, since 2×431404433321² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (431404433311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215702216660 + 215702216661.

It is an arithmetic number, because the mean of its divisors is an integer number (215702216661).

Almost surely, 2^431404433321 is an apocalyptic number.

It is an amenable number.

431404433321 is a deficient number, since it is larger than the sum of its proper divisors (1).

431404433321 is an equidigital number, since it uses as much as digits as its factorization.

431404433321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 431404433321 its reverse (123334404134), we get a palindrome (554738837455).

The spelling of 431404433321 in words is "four hundred thirty-one billion, four hundred four million, four hundred thirty-three thousand, three hundred twenty-one".