43193949431 has 2 divisors, whose sum is σ = 43193949432. Its totient is φ = 43193949430.

The previous prime is 43193949427. The next prime is 43193949437. The reversal of 43193949431 is 13494939134.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43193949431 - 2² = 43193949427 is a prime.

It is a super-2 number, since 2×43193949431² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43193949431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43193949437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21596974715 + 21596974716.

It is an arithmetic number, because the mean of its divisors is an integer number (21596974716).

Almost surely, 2^43193949431 is an apocalyptic number.

43193949431 is a deficient number, since it is larger than the sum of its proper divisors (1).

43193949431 is an equidigital number, since it uses as much as digits as its factorization.

43193949431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 50.

The spelling of 43193949431 in words is "forty-three billion, one hundred ninety-three million, nine hundred forty-nine thousand, four hundred thirty-one".