431404433381 has 2 divisors, whose sum is σ = 431404433382. Its totient is φ = 431404433380.

The previous prime is 431404433321. The next prime is 431404433399. The reversal of 431404433381 is 183334404134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 398836456225 + 32567977156 = 631535^2 + 180466^2 .

It is a cyclic number.

It is not a de Polignac number, because 431404433381 - 2¹⁴ = 431404416997 is a prime.

It is a super-2 number, since 2×431404433381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215702216690 + 215702216691.

It is an arithmetic number, because the mean of its divisors is an integer number (215702216691).

Almost surely, 2^431404433381 is an apocalyptic number.

It is an amenable number.

431404433381 is a deficient number, since it is larger than the sum of its proper divisors (1).

431404433381 is an equidigital number, since it uses as much as digits as its factorization.

431404433381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 431404433381 in words is "four hundred thirty-one billion, four hundred four million, four hundred thirty-three thousand, three hundred eighty-one".