43423521 has 8 divisors (see below), whose sum is σ = 58847424. Its totient is φ = 28474320.

The previous prime is 43423453. The next prime is 43423553. The reversal of 43423521 is 12532434.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43423521 - 2²³ = 35034913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43423491 and 43423500.

It is not an unprimeable number, because it can be changed into a prime (43423921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118461 + ... + 118826.

It is an arithmetic number, because the mean of its divisors is an integer number (7355928).

Almost surely, 2^43423521 is an apocalyptic number.

It is an amenable number.

43423521 is a deficient number, since it is larger than the sum of its proper divisors (15423903).

43423521 is a wasteful number, since it uses less digits than its factorization.

43423521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237351.

The product of its digits is 2880, while the sum is 24.

The square root of 43423521 is about 6589.6525705078. The cubic root of 43423521 is about 351.4862539283.

Adding to 43423521 its reverse (12532434), we get a palindrome (55955955).

The spelling of 43423521 in words is "forty-three million, four hundred twenty-three thousand, five hundred twenty-one".