40943561 has 8 divisors (see below), whose sum is σ = 41613000. Its totient is φ = 40279680.

The previous prime is 40943521. The next prime is 40943569. The reversal of 40943561 is 16534904.

It can be written as a sum of positive squares in 4 ways, for example, as 430336 + 40513225 = 656^2 + 6365^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40943561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40943569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14981 + ... + 17501.

It is an arithmetic number, because the mean of its divisors is an integer number (5201625).

Almost surely, 2^40943561 is an apocalyptic number.

It is an amenable number.

40943561 is a deficient number, since it is larger than the sum of its proper divisors (669439).

40943561 is a wasteful number, since it uses less digits than its factorization.

40943561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 40943561 is about 6398.7155742383. The cubic root of 40943561 is about 344.6634286720.

The spelling of 40943561 in words is "forty million, nine hundred forty-three thousand, five hundred sixty-one".