43236543121 has 4 divisors (see below), whose sum is σ = 43323190000. Its totient is φ = 43149896244.

The previous prime is 43236543083. The next prime is 43236543137. The reversal of 43236543121 is 12134563234.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43236543121 is a prime.

It is a super-2 number, since 2×43236543121² (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 (43236543151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43322691 + ... + 43323688.

It is an arithmetic number, because the mean of its divisors is an integer number (10830797500).

Almost surely, 2^43236543121 is an apocalyptic number.

It is an amenable number.

43236543121 is a deficient number, since it is larger than the sum of its proper divisors (86646879).

43236543121 is an equidigital number, since it uses as much as digits as its factorization.

43236543121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86646878.

The product of its digits is 51840, while the sum is 34.

The spelling of 43236543121 in words is "forty-three billion, two hundred thirty-six million, five hundred forty-three thousand, one hundred twenty-one".