40131085 has 4 divisors (see below), whose sum is σ = 48157308. Its totient is φ = 32104864.

The previous prime is 40131071. The next prime is 40131109. The reversal of 40131085 is 58013104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10949481 + 29181604 = 3309^2 + 5402^2 .

It is a cyclic number.

It is not a de Polignac number, because 40131085 - 2¹⁹ = 39606797 is a prime.

It is a super-2 number, since 2×40131085² = 3221007966554450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4013104 + ... + 4013113.

It is an arithmetic number, because the mean of its divisors is an integer number (12039327).

Almost surely, 2^40131085 is an apocalyptic number.

It is an amenable number.

40131085 is a deficient number, since it is larger than the sum of its proper divisors (8026223).

40131085 is an equidigital number, since it uses as much as digits as its factorization.

40131085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8026222.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 40131085 is about 6334.9100230390. The cubic root of 40131085 is about 342.3683689746.

Adding to 40131085 its reverse (58013104), we get a palindrome (98144189).

The spelling of 40131085 in words is "forty million, one hundred thirty-one thousand, eighty-five".