43421131 has 8 divisors (see below), whose sum is σ = 47191760. Its totient is φ = 39712032.

The previous prime is 43421113. The next prime is 43421143. The reversal of 43421131 is 13112434.

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

It is a cyclic number.

It is not a de Polignac number, because 43421131 - 2¹¹ = 43419083 is a prime.

It is a super-2 number, since 2×43421131² = 3770789234638322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43421099 and 43421108.

It is not an unprimeable number, because it can be changed into a prime (43425131) 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, 13905 + ... + 16738.

It is an arithmetic number, because the mean of its divisors is an integer number (5898970).

Almost surely, 2^43421131 is an apocalyptic number.

43421131 is a deficient number, since it is larger than the sum of its proper divisors (3770629).

43421131 is a wasteful number, since it uses less digits than its factorization.

43421131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30765.

The product of its digits is 288, while the sum is 19.

The square root of 43421131 is about 6589.4712230952. The cubic root of 43421131 is about 351.4798052914.

Adding to 43421131 its reverse (13112434), we get a palindrome (56533565).

The spelling of 43421131 in words is "forty-three million, four hundred twenty-one thousand, one hundred thirty-one".