43420120033 has 4 divisors (see below), whose sum is σ = 43469630740. Its totient is φ = 43370609328.

The previous prime is 43420120021. The next prime is 43420120039. The reversal of 43420120033 is 33002102434.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21073457889 + 22346662144 = 145167^2 + 149488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43420120033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43420119986 and 43420120013.

It is not an unprimeable number, because it can be changed into a prime (43420120039) 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, 24754038 + ... + 24755791.

It is an arithmetic number, because the mean of its divisors is an integer number (10867407685).

Almost surely, 2^43420120033 is an apocalyptic number.

It is an amenable number.

43420120033 is a deficient number, since it is larger than the sum of its proper divisors (49510707).

43420120033 is an equidigital number, since it uses as much as digits as its factorization.

43420120033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49510706.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 43420120033 its reverse (33002102434), we get a palindrome (76422222467).

The spelling of 43420120033 in words is "forty-three billion, four hundred twenty million, one hundred twenty thousand, thirty-three".