43042333021 has 4 divisors (see below), whose sum is σ = 43042879872. Its totient is φ = 43041786172.

The previous prime is 43042332979. The next prime is 43042333079. The reversal of 43042333021 is 12033324034.

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 43042333021 - 2¹⁵ = 43042300253 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 (43042333091) 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, 130435 + ... + 321088.

It is an arithmetic number, because the mean of its divisors is an integer number (10760719968).

Almost surely, 2^43042333021 is an apocalyptic number.

It is an amenable number.

43042333021 is a deficient number, since it is larger than the sum of its proper divisors (546851).

43042333021 is an equidigital number, since it uses as much as digits as its factorization.

43042333021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546850.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 43042333021 its reverse (12033324034), we get a palindrome (55075657055).

The spelling of 43042333021 in words is "forty-three billion, forty-two million, three hundred thirty-three thousand, twenty-one".