43199121 has 16 divisors (see below), whose sum is σ = 66811904. Its totient is φ = 24315984.

The previous prime is 43199113. The next prime is 43199131. The reversal of 43199121 is 12199134.

It is not a de Polignac number, because 43199121 - 2³ = 43199113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43199131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13945 + ... + 16758.

It is an arithmetic number, because the mean of its divisors is an integer number (4175744).

Almost surely, 2^43199121 is an apocalyptic number.

It is an amenable number.

43199121 is a deficient number, since it is larger than the sum of its proper divisors (23612783).

43199121 is a wasteful number, since it uses less digits than its factorization.

43199121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30780.

The product of its digits is 1944, while the sum is 30.

The square root of 43199121 is about 6572.6038219263. The cubic root of 43199121 is about 350.8797487439.

The spelling of 43199121 in words is "forty-three million, one hundred ninety-nine thousand, one hundred twenty-one".