40512943 has 4 divisors (see below), whose sum is σ = 40535320. Its totient is φ = 40490568.

The previous prime is 40512937. The next prime is 40512947. The reversal of 40512943 is 34921504.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40512943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40512947) 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, 8208 + ... + 12181.

It is an arithmetic number, because the mean of its divisors is an integer number (10133830).

Almost surely, 2^40512943 is an apocalyptic number.

40512943 is a deficient number, since it is larger than the sum of its proper divisors (22377).

40512943 is a wasteful number, since it uses less digits than its factorization.

40512943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22376.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 40512943 is about 6364.9778475655. The cubic root of 40512943 is about 343.4508516757.

The spelling of 40512943 in words is "forty million, five hundred twelve thousand, nine hundred forty-three".