43512708409 has 9 divisors (see below), whose sum is σ = 45071151853. Its totient is φ = 42006429472.

The previous prime is 43512708391. The next prime is 43512708443. The reversal of 43512708409 is 90480721534.

The square root of 43512708409 is 208597.

It is a perfect power (a square), and thus also a powerful number.

43512708409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10378515625 + 33134192784 = 101875^2 + 182028^2 .

It is not a de Polignac number, because 43512708409 - 2⁹ = 43512707897 is a prime.

It is a super-2 number, since 2×43512708409² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43512705409) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6045717 + ... + 6052909.

Almost surely, 2^43512708409 is an apocalyptic number.

43512708409 is the 208597-th square number.

43512708409 is the 104299-th centered octagonal number.

It is an amenable number.

43512708409 is a deficient number, since it is larger than the sum of its proper divisors (1558443444).

43512708409 is an frugal number, since it uses more digits than its factorization.

43512708409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14444 (or 7222 counting only the distinct ones).

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

The spelling of 43512708409 in words is "forty-three billion, five hundred twelve million, seven hundred eight thousand, four hundred nine".