43318617451 has 2 divisors, whose sum is σ = 43318617452. Its totient is φ = 43318617450.

The previous prime is 43318617431. The next prime is 43318617479. The reversal of 43318617451 is 15471681334.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43318617451 - 2¹³ = 43318609259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43318617398 and 43318617407.

It is not a weakly prime, because it can be changed into another prime (43318617421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21659308725 + 21659308726.

It is an arithmetic number, because the mean of its divisors is an integer number (21659308726).

Almost surely, 2^43318617451 is an apocalyptic number.

43318617451 is a deficient number, since it is larger than the sum of its proper divisors (1).

43318617451 is an equidigital number, since it uses as much as digits as its factorization.

43318617451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The spelling of 43318617451 in words is "forty-three billion, three hundred eighteen million, six hundred seventeen thousand, four hundred fifty-one".