43336561 has 4 divisors (see below), whose sum is σ = 44344432. Its totient is φ = 42328692.

The previous prime is 43336507. The next prime is 43336571. The reversal of 43336561 is 16563334.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43336561 - 2⁹ = 43336049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43336571) 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, 503871 + ... + 503956.

It is an arithmetic number, because the mean of its divisors is an integer number (11086108).

Almost surely, 2^43336561 is an apocalyptic number.

It is an amenable number.

43336561 is a deficient number, since it is larger than the sum of its proper divisors (1007871).

43336561 is a wasteful number, since it uses less digits than its factorization.

43336561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007870.

The product of its digits is 19440, while the sum is 31.

The square root of 43336561 is about 6583.0510403611. The cubic root of 43336561 is about 351.2514681870.

Adding to 43336561 its reverse (16563334), we get a palindrome (59899895).

The spelling of 43336561 in words is "forty-three million, three hundred thirty-six thousand, five hundred sixty-one".