43155135021 has 4 divisors (see below), whose sum is σ = 57540180032. Its totient is φ = 28770090012.

The previous prime is 43155135019. The next prime is 43155135041. The reversal of 43155135021 is 12053155134.

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 not a de Polignac number, because 43155135021 - 2¹ = 43155135019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43155135021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43155135011) 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 3 ways as a sum of consecutive naturals, for example, 7192522501 + ... + 7192522506.

It is an arithmetic number, because the mean of its divisors is an integer number (14385045008).

Almost surely, 2^43155135021 is an apocalyptic number.

It is an amenable number.

43155135021 is a deficient number, since it is larger than the sum of its proper divisors (14385045011).

43155135021 is a wasteful number, since it uses less digits than its factorization.

43155135021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14385045010.

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 43155135021 in words is "forty-three billion, one hundred fifty-five million, one hundred thirty-five thousand, twenty-one".