43539970243 has 16 divisors (see below), whose sum is σ = 54354263040. Its totient is φ = 33883084800.

The previous prime is 43539970241. The next prime is 43539970289. The reversal of 43539970243 is 34207993534.

It is a cyclic number.

It is not a de Polignac number, because 43539970243 - 2¹ = 43539970241 is a prime.

It is a super-2 number, since 2×43539970243² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43539970241) 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 in 15 ways as a sum of consecutive naturals, for example, 308443 + ... + 426868.

It is an arithmetic number, because the mean of its divisors is an integer number (3397141440).

Almost surely, 2^43539970243 is an apocalyptic number.

43539970243 is a deficient number, since it is larger than the sum of its proper divisors (10814292797).

43539970243 is a wasteful number, since it uses less digits than its factorization.

43539970243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736098.

The product of its (nonzero) digits is 2449440, while the sum is 49.

The spelling of 43539970243 in words is "forty-three billion, five hundred thirty-nine million, nine hundred seventy thousand, two hundred forty-three".