43138365 has 16 divisors (see below), whose sum is σ = 69225408. Its totient is φ = 22939136.

The previous prime is 43138351. The next prime is 43138369. The reversal of 43138365 is 56383134.

It is a cyclic number.

It is not a de Polignac number, because 43138365 - 2⁴ = 43138349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43138369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1222 + ... + 9368.

It is an arithmetic number, because the mean of its divisors is an integer number (4326588).

Almost surely, 2^43138365 is an apocalyptic number.

It is an amenable number.

43138365 is a deficient number, since it is larger than the sum of its proper divisors (26087043).

43138365 is a wasteful number, since it uses less digits than its factorization.

43138365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8508.

The product of its digits is 25920, while the sum is 33.

The square root of 43138365 is about 6567.9802831616. The cubic root of 43138365 is about 350.7151770939.

The spelling of 43138365 in words is "forty-three million, one hundred thirty-eight thousand, three hundred sixty-five".