40566143 has 4 divisors (see below), whose sum is σ = 40704888. Its totient is φ = 40427400.

The previous prime is 40566133. The next prime is 40566191. The reversal of 40566143 is 34166504.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40566143 - 2¹² = 40562047 is a prime.

It is a super-2 number, since 2×40566143² = 3291223915792898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40566133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68933 + ... + 69518.

It is an arithmetic number, because the mean of its divisors is an integer number (10176222).

Almost surely, 2^40566143 is an apocalyptic number.

40566143 is a deficient number, since it is larger than the sum of its proper divisors (138745).

40566143 is a wasteful number, since it uses less digits than its factorization.

40566143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138744.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 40566143 is about 6369.1555955244. The cubic root of 40566143 is about 343.6011212928.

The spelling of 40566143 in words is "forty million, five hundred sixty-six thousand, one hundred forty-three".