40543633 has 4 divisors (see below), whose sum is σ = 43662388. Its totient is φ = 37424880.

The previous prime is 40543621. The next prime is 40543639. The reversal of 40543633 is 33634504.

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 22165264 + 18378369 = 4708^2 + 4287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40543633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40543639) 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, 1559358 + ... + 1559383.

It is an arithmetic number, because the mean of its divisors is an integer number (10915597).

Almost surely, 2^40543633 is an apocalyptic number.

It is an amenable number.

40543633 is a deficient number, since it is larger than the sum of its proper divisors (3118755).

40543633 is a wasteful number, since it uses less digits than its factorization.

40543633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118754.

The product of its (nonzero) digits is 12960, while the sum is 28.

The square root of 40543633 is about 6367.3882400871. The cubic root of 40543633 is about 343.5375552110.

The spelling of 40543633 in words is "forty million, five hundred forty-three thousand, six hundred thirty-three".