40881165 has 16 divisors (see below), whose sum is σ = 70441728. Its totient is φ = 20126016.

The previous prime is 40881149. The next prime is 40881187. The reversal of 40881165 is 56118804.

It is not a de Polignac number, because 40881165 - 2⁴ = 40881149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104629 + ... + 105018.

It is an arithmetic number, because the mean of its divisors is an integer number (4402608).

Almost surely, 2^40881165 is an apocalyptic number.

It is an amenable number.

40881165 is a deficient number, since it is larger than the sum of its proper divisors (29560563).

40881165 is a wasteful number, since it uses less digits than its factorization.

40881165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209668.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 40881165 is about 6393.8380492471. The cubic root of 40881165 is about 344.4882562107.

Adding to 40881165 its reverse (56118804), we get a palindrome (96999969).

It can be divided in two parts, 4088 and 1165, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 40881165 in words is "forty million, eight hundred eighty-one thousand, one hundred sixty-five".