40336181 has 4 divisors (see below), whose sum is σ = 42089952. Its totient is φ = 38582412.

The previous prime is 40336171. The next prime is 40336217. The reversal of 40336181 is 18163304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40336181 is a prime.

It is a super-2 number, since 2×40336181² = 3254014995329522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40336181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40336171) 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, 876851 + ... + 876896.

It is an arithmetic number, because the mean of its divisors is an integer number (10522488).

Almost surely, 2^40336181 is an apocalyptic number.

It is an amenable number.

40336181 is a deficient number, since it is larger than the sum of its proper divisors (1753771).

40336181 is a wasteful number, since it uses less digits than its factorization.

40336181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753770.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 40336181 is about 6351.0771527356. The cubic root of 40336181 is about 342.9506200393.

Adding to 40336181 its reverse (18163304), we get a palindrome (58499485).

The spelling of 40336181 in words is "forty million, three hundred thirty-six thousand, one hundred eighty-one".