43020043 has 4 divisors (see below), whose sum is σ = 46930968. Its totient is φ = 39109120.

The previous prime is 43020031. The next prime is 43020049. The reversal of 43020043 is 34002034.

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

It is a cyclic number.

It is not a de Polignac number, because 43020043 - 2¹³ = 43011851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43019999 and 43020026.

It is not an unprimeable number, because it can be changed into a prime (43020049) 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, 1955446 + ... + 1955467.

It is an arithmetic number, because the mean of its divisors is an integer number (11732742).

Almost surely, 2^43020043 is an apocalyptic number.

43020043 is a deficient number, since it is larger than the sum of its proper divisors (3910925).

43020043 is a wasteful number, since it uses less digits than its factorization.

43020043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910924.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 43020043 is about 6558.9666106788. The cubic root of 43020043 is about 350.3942306124.

Adding to 43020043 its reverse (34002034), we get a palindrome (77022077).

Subtracting from 43020043 its reverse (34002034), we obtain a square (9018009 = 3003²).

The spelling of 43020043 in words is "forty-three million, twenty thousand, forty-three".