43131121 has 8 divisors (see below), whose sum is σ = 49528800. Its totient is φ = 37146240.

The previous prime is 43131119. The next prime is 43131131. The reversal of 43131121 is 12113134.

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 43131121 - 2¹ = 43131119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43131095 and 43131104.

It is not an unprimeable number, because it can be changed into a prime (43131131) 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, 102976 + ... + 103393.

It is an arithmetic number, because the mean of its divisors is an integer number (6191100).

Almost surely, 2^43131121 is an apocalyptic number.

It is an amenable number.

43131121 is a deficient number, since it is larger than the sum of its proper divisors (6397679).

43131121 is a wasteful number, since it uses less digits than its factorization.

43131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206399.

The product of its digits is 72, while the sum is 16.

The square root of 43131121 is about 6567.4287967210. The cubic root of 43131121 is about 350.6955447399.

Adding to 43131121 its reverse (12113134), we get a palindrome (55244255).

The spelling of 43131121 in words is "forty-three million, one hundred thirty-one thousand, one hundred twenty-one".