43504361 has 4 divisors (see below), whose sum is σ = 44325252. Its totient is φ = 42683472.

The previous prime is 43504337. The next prime is 43504369. The reversal of 43504361 is 16340534.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40195600 + 3308761 = 6340^2 + 1819^2 .

It is a cyclic number.

It is not a de Polignac number, because 43504361 - 2¹⁸ = 43242217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43504361.

It is not an unprimeable number, because it can be changed into a prime (43504369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410366 + ... + 410471.

It is an arithmetic number, because the mean of its divisors is an integer number (11081313).

Almost surely, 2^43504361 is an apocalyptic number.

It is an amenable number.

43504361 is a deficient number, since it is larger than the sum of its proper divisors (820891).

43504361 is an equidigital number, since it uses as much as digits as its factorization.

43504361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820890.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 43504361 is about 6595.7835774076. The cubic root of 43504361 is about 351.7042351345.

Adding to 43504361 its reverse (16340534), we get a palindrome (59844895).

The spelling of 43504361 in words is "forty-three million, five hundred four thousand, three hundred sixty-one".