43133240221 has 4 divisors (see below), whose sum is σ = 43137223200. Its totient is φ = 43129257244.

The previous prime is 43133240201. The next prime is 43133240231. The reversal of 43133240221 is 12204233134.

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 not a de Polignac number, because 43133240221 - 2⁷ = 43133240093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43133240201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1975201 + ... + 1996918.

It is an arithmetic number, because the mean of its divisors is an integer number (10784305800).

Almost surely, 2^43133240221 is an apocalyptic number.

It is an amenable number.

43133240221 is a deficient number, since it is larger than the sum of its proper divisors (3982979).

43133240221 is a wasteful number, since it uses less digits than its factorization.

43133240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3982978.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 43133240221 its reverse (12204233134), we get a palindrome (55337473355).

The spelling of 43133240221 in words is "forty-three billion, one hundred thirty-three million, two hundred forty thousand, two hundred twenty-one".