40643133 has 4 divisors (see below), whose sum is σ = 54190848. Its totient is φ = 27095420.

The previous prime is 40643129. The next prime is 40643137. The reversal of 40643133 is 33134604.

40643133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (40643129) and next prime (40643137).

It is a cyclic number.

It is not a de Polignac number, because 40643133 - 2² = 40643129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40643137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6773853 + ... + 6773858.

It is an arithmetic number, because the mean of its divisors is an integer number (13547712).

Almost surely, 2^40643133 is an apocalyptic number.

It is an amenable number.

40643133 is a deficient number, since it is larger than the sum of its proper divisors (13547715).

40643133 is a wasteful number, since it uses less digits than its factorization.

40643133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13547714.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 40643133 is about 6375.1967028477. The cubic root of 40643133 is about 343.8183560811.

Adding to 40643133 its reverse (33134604), we get a palindrome (73777737).

The spelling of 40643133 in words is "forty million, six hundred forty-three thousand, one hundred thirty-three".