40033181 has 8 divisors (see below), whose sum is σ = 42699960. Its totient is φ = 37401088.

The previous prime is 40033163. The next prime is 40033187. The reversal of 40033181 is 18133004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22477081 + 17556100 = 4741^2 + 4190^2 .

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

It is not a de Polignac number, because 40033181 - 2⁶ = 40033117 is a prime.

It is a super-2 number, since 2×40033181² = 3205311161957522, 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 (40033187) 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, 6266 + ... + 10923.

It is an arithmetic number, because the mean of its divisors is an integer number (5337495).

Almost surely, 2^40033181 is an apocalyptic number.

It is an amenable number.

40033181 is a deficient number, since it is larger than the sum of its proper divisors (2666779).

40033181 is a wasteful number, since it uses less digits than its factorization.

40033181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17343.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 40033181 is about 6327.1779649382. The cubic root of 40033181 is about 342.0897277193.

Adding to 40033181 its reverse (18133004), we get a palindrome (58166185).

The spelling of 40033181 in words is "forty million, thirty-three thousand, one hundred eighty-one".