43442051321 has 4 divisors (see below), whose sum is σ = 43444094592. Its totient is φ = 43440008052.

The previous prime is 43442051299. The next prime is 43442051333. The reversal of 43442051321 is 12315024434.

43442051321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-43442051321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43442051371) 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, 989405 + ... + 1032378.

It is an arithmetic number, because the mean of its divisors is an integer number (10861023648).

Almost surely, 2^43442051321 is an apocalyptic number.

It is an amenable number.

43442051321 is a deficient number, since it is larger than the sum of its proper divisors (2043271).

43442051321 is a wasteful number, since it uses less digits than its factorization.

43442051321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043270.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 43442051321 its reverse (12315024434), we get a palindrome (55757075755).

The spelling of 43442051321 in words is "forty-three billion, four hundred forty-two million, fifty-one thousand, three hundred twenty-one".