43138415309 has 12 divisors (see below), whose sum is σ = 49912218720. Its totient is φ = 37152700200.

The previous prime is 43138415303. The next prime is 43138415339. The reversal of 43138415309 is 90351483134.

It is not a de Polignac number, because 43138415309 - 2¹² = 43138411213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43138415303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9379697 + ... + 9384294.

It is an arithmetic number, because the mean of its divisors is an integer number (4159351560).

Almost surely, 2^43138415309 is an apocalyptic number.

It is an amenable number.

43138415309 is a deficient number, since it is larger than the sum of its proper divisors (6773803411).

43138415309 is a wasteful number, since it uses less digits than its factorization.

43138415309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18764032 (or 18764021 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 43138415309 in words is "forty-three billion, one hundred thirty-eight million, four hundred fifteen thousand, three hundred nine".