40565161 has 8 divisors (see below), whose sum is σ = 49926464. Its totient is φ = 32095440.

The previous prime is 40565149. The next prime is 40565191. The reversal of 40565161 is 16156504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40565161 - 2¹³ = 40556969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40565131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222795 + ... + 222976.

It is an arithmetic number, because the mean of its divisors is an integer number (6240808).

Almost surely, 2^40565161 is an apocalyptic number.

It is an amenable number.

40565161 is a deficient number, since it is larger than the sum of its proper divisors (9361303).

40565161 is a wasteful number, since it uses less digits than its factorization.

40565161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445791.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 40565161 is about 6369.0785047760. The cubic root of 40565161 is about 343.5983487095.

The spelling of 40565161 in words is "forty million, five hundred sixty-five thousand, one hundred sixty-one".