431343221819 has 2 divisors, whose sum is σ = 431343221820. Its totient is φ = 431343221818.

The previous prime is 431343221807. The next prime is 431343221839. The reversal of 431343221819 is 918122343134.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431343221819 is a prime.

It is a super-2 number, since 2×431343221819² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (431343221839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215671610909 + 215671610910.

It is an arithmetic number, because the mean of its divisors is an integer number (215671610910).

Almost surely, 2^431343221819 is an apocalyptic number.

431343221819 is a deficient number, since it is larger than the sum of its proper divisors (1).

431343221819 is an equidigital number, since it uses as much as digits as its factorization.

431343221819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The spelling of 431343221819 in words is "four hundred thirty-one billion, three hundred forty-three million, two hundred twenty-one thousand, eight hundred nineteen".