43611121 has 2 divisors, whose sum is σ = 43611122. Its totient is φ = 43611120.

The previous prime is 43611109. The next prime is 43611131. The reversal of 43611121 is 12111634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43296400 + 314721 = 6580^2 + 561^2 .

It is a cyclic number.

It is not a de Polignac number, because 43611121 - 2⁷ = 43610993 is a prime.

It is not a weakly prime, because it can be changed into another prime (43611131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21805560 + 21805561.

It is an arithmetic number, because the mean of its divisors is an integer number (21805561).

Almost surely, 2^43611121 is an apocalyptic number.

It is an amenable number.

43611121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43611121 is an equidigital number, since it uses as much as digits as its factorization.

43611121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

The square root of 43611121 is about 6603.8716674387. The cubic root of 43611121 is about 351.9916949874.

Adding to 43611121 its reverse (12111634), we get a palindrome (55722755).

The spelling of 43611121 in words is "forty-three million, six hundred eleven thousand, one hundred twenty-one".