43143426509 has 2 divisors, whose sum is σ = 43143426510. Its totient is φ = 43143426508.

The previous prime is 43143426467. The next prime is 43143426551. The reversal of 43143426509 is 90562434134.

It is a balanced prime because it is at equal distance from previous prime (43143426467) and next prime (43143426551).

It can be written as a sum of positive squares in only one way, i.e., 36196204009 + 6947222500 = 190253^2 + 83350^2 .

It is a cyclic number.

It is not a de Polignac number, because 43143426509 - 2⁸ = 43143426253 is a prime.

It is a super-2 number, since 2×43143426509² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43143426409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21571713254 + 21571713255.

It is an arithmetic number, because the mean of its divisors is an integer number (21571713255).

Almost surely, 2^43143426509 is an apocalyptic number.

It is an amenable number.

43143426509 is a deficient number, since it is larger than the sum of its proper divisors (1).

43143426509 is an equidigital number, since it uses as much as digits as its factorization.

43143426509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 43143426509 in words is "forty-three billion, one hundred forty-three million, four hundred twenty-six thousand, five hundred nine".