43531013005409 has 2 divisors, whose sum is σ = 43531013005410. Its totient is φ = 43531013005408.

The previous prime is 43531013005379. The next prime is 43531013005453. The reversal of 43531013005409 is 90450031013534.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29708440797025 + 13822572208384 = 5450545^2 + 3717872^2 .

It is a cyclic number.

It is not a de Polignac number, because 43531013005409 - 2⁸ = 43531013005153 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43531013005489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21765506502704 + 21765506502705.

It is an arithmetic number, because the mean of its divisors is an integer number (21765506502705).

Almost surely, 2^{43531013005409} is an apocalyptic number.

It is an amenable number.

43531013005409 is a deficient number, since it is larger than the sum of its proper divisors (1).

43531013005409 is an equidigital number, since it uses as much as digits as its factorization.

43531013005409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 43531013005409 in words is "forty-three trillion, five hundred thirty-one billion, thirteen million, five thousand, four hundred nine".