40502181 has 8 divisors (see below), whose sum is σ = 54077824. Its totient is φ = 26964000.

The previous prime is 40502159. The next prime is 40502191. The reversal of 40502181 is 18120504.

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

It is not a de Polignac number, because 40502181 - 2⁶ = 40502117 is a prime.

It is a super-2 number, since 2×40502181² = 3280853331513522, 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 (40502101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6736 + ... + 11241.

It is an arithmetic number, because the mean of its divisors is an integer number (6759728).

Almost surely, 2^40502181 is an apocalyptic number.

It is an amenable number.

40502181 is a deficient number, since it is larger than the sum of its proper divisors (13575643).

40502181 is a wasteful number, since it uses less digits than its factorization.

40502181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18731.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 40502181 is about 6364.1323839153. The cubic root of 40502181 is about 343.4204371535.

Adding to 40502181 its reverse (18120504), we get a palindrome (58622685).

The spelling of 40502181 in words is "forty million, five hundred two thousand, one hundred eighty-one".