43138363621 has 8 divisors (see below), whose sum is σ = 45025530624. Its totient is φ = 41252162160.

The previous prime is 43138363607. The next prime is 43138363657. The reversal of 43138363621 is 12636383134.

43138363621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43138363621 - 2¹⁹ = 43137839333 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 (43138363601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149325 + ... + 329506.

It is an arithmetic number, because the mean of its divisors is an integer number (5628191328).

Almost surely, 2^43138363621 is an apocalyptic number.

It is an amenable number.

43138363621 is a deficient number, since it is larger than the sum of its proper divisors (1887167003).

43138363621 is a wasteful number, since it uses less digits than its factorization.

43138363621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482771.

The product of its digits is 186624, while the sum is 40.

The spelling of 43138363621 in words is "forty-three billion, one hundred thirty-eight million, three hundred sixty-three thousand, six hundred twenty-one".