43451243515423 has 2 divisors, whose sum is σ = 43451243515424. Its totient is φ = 43451243515422.

The previous prime is 43451243515403. The next prime is 43451243515439. The reversal of 43451243515423 is 32451534215434.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43451243515423 - 2⁵ = 43451243515391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43451243515403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21725621757711 + 21725621757712.

It is an arithmetic number, because the mean of its divisors is an integer number (21725621757712).

Almost surely, 2^{43451243515423} is an apocalyptic number.

43451243515423 is a deficient number, since it is larger than the sum of its proper divisors (1).

43451243515423 is an equidigital number, since it uses as much as digits as its factorization.

43451243515423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456000, while the sum is 46.

The spelling of 43451243515423 in words is "forty-three trillion, four hundred fifty-one billion, two hundred forty-three million, five hundred fifteen thousand, four hundred twenty-three".