43220413 has 4 divisors (see below), whose sum is σ = 43236220. Its totient is φ = 43204608.

The previous prime is 43220399. The next prime is 43220431. The reversal of 43220413 is 31402234.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31402234 = 2 ⋅15701117.

It can be written as a sum of positive squares in 2 ways, for example, as 38713284 + 4507129 = 6222^2 + 2123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43220413 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 (43220113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2628 + ... + 9661.

It is an arithmetic number, because the mean of its divisors is an integer number (10809055).

Almost surely, 2^43220413 is an apocalyptic number.

It is an amenable number.

43220413 is a deficient number, since it is larger than the sum of its proper divisors (15807).

43220413 is a wasteful number, since it uses less digits than its factorization.

43220413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15806.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 43220413 is about 6574.2233761867. The cubic root of 43220413 is about 350.9373865256.

Adding to 43220413 its reverse (31402234), we get a palindrome (74622647).

The spelling of 43220413 in words is "forty-three million, two hundred twenty thousand, four hundred thirteen".