40564871 has 2 divisors, whose sum is σ = 40564872. Its totient is φ = 40564870.

The previous prime is 40564837. The next prime is 40564883. The reversal of 40564871 is 17846504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40564871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40564171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20282435 + 20282436.

It is an arithmetic number, because the mean of its divisors is an integer number (20282436).

Almost surely, 2^40564871 is an apocalyptic number.

40564871 is a deficient number, since it is larger than the sum of its proper divisors (1).

40564871 is an equidigital number, since it uses as much as digits as its factorization.

40564871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 40564871 is about 6369.0557384906. The cubic root of 40564871 is about 343.5975299137.

The spelling of 40564871 in words is "forty million, five hundred sixty-four thousand, eight hundred seventy-one".