43331121 has 24 divisors (see below), whose sum is σ = 64173096. Its totient is φ = 28166400.

The previous prime is 43331089. The next prime is 43331129. The reversal of 43331121 is 12113334.

It can be written as a sum of positive squares in 4 ways, for example, as 12960000 + 30371121 = 3600^2 + 5511^2 .

It is not a de Polignac number, because 43331121 - 2⁵ = 43331089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43331094 and 43331103.

It is not an unprimeable number, because it can be changed into a prime (43331129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66031 + ... + 66683.

It is an arithmetic number, because the mean of its divisors is an integer number (2673879).

Almost surely, 2^43331121 is an apocalyptic number.

It is an amenable number.

43331121 is a deficient number, since it is larger than the sum of its proper divisors (20841975).

43331121 is a wasteful number, since it uses less digits than its factorization.

43331121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 830 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 43331121 is about 6582.6378451195. The cubic root of 43331121 is about 351.2367701437.

Adding to 43331121 its reverse (12113334), we get a palindrome (55444455).

The spelling of 43331121 in words is "forty-three million, three hundred thirty-one thousand, one hundred twenty-one".