40552181 has 4 divisors (see below), whose sum is σ = 40635264. Its totient is φ = 40469100.

The previous prime is 40552177. The next prime is 40552189. The reversal of 40552181 is 18125504.

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 not a de Polignac number, because 40552181 - 2² = 40552177 is a prime.

It is a super-2 number, since 2×40552181² = 3288958767713522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40552181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40552189) 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, 40805 + ... + 41786.

It is an arithmetic number, because the mean of its divisors is an integer number (10158816).

Almost surely, 2^40552181 is an apocalyptic number.

It is an amenable number.

40552181 is a deficient number, since it is larger than the sum of its proper divisors (83083).

40552181 is an equidigital number, since it uses as much as digits as its factorization.

40552181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83082.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 40552181 is about 6368.0594375367. The cubic root of 40552181 is about 343.5616967136.

Adding to 40552181 its reverse (18125504), we get a palindrome (58677685).

The spelling of 40552181 in words is "forty million, five hundred fifty-two thousand, one hundred eighty-one".