43042013 has 4 divisors (see below), whose sum is σ = 49190880. Its totient is φ = 36893148.

The previous prime is 43042009. The next prime is 43042019. The reversal of 43042013 is 31024034.

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 43042013 - 2² = 43042009 is a prime.

It is a super-2 number, since 2×43042013² = 3705229766184338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43041982 and 43042000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43042019) 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, 3074423 + ... + 3074436.

It is an arithmetic number, because the mean of its divisors is an integer number (12297720).

Almost surely, 2^43042013 is an apocalyptic number.

It is an amenable number.

43042013 is a deficient number, since it is larger than the sum of its proper divisors (6148867).

43042013 is an equidigital number, since it uses as much as digits as its factorization.

43042013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6148866.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 43042013 is about 6560.6412034191. The cubic root of 43042013 is about 350.4538683271.

Adding to 43042013 its reverse (31024034), we get a palindrome (74066047).

The spelling of 43042013 in words is "forty-three million, forty-two thousand, thirteen".