40112081 has 2 divisors, whose sum is σ = 40112082. Its totient is φ = 40112080.

The previous prime is 40112003. The next prime is 40112117. The reversal of 40112081 is 18021104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25603600 + 14508481 = 5060^2 + 3809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40112081 is a prime.

It is a super-2 number, since 2×40112081² = 3217958084301122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40111081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20056040 + 20056041.

It is an arithmetic number, because the mean of its divisors is an integer number (20056041).

Almost surely, 2^40112081 is an apocalyptic number.

It is an amenable number.

40112081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40112081 is an equidigital number, since it uses as much as digits as its factorization.

40112081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 40112081 is about 6333.4099030459. The cubic root of 40112081 is about 342.3143178088.

Adding to 40112081 its reverse (18021104), we get a palindrome (58133185).

The spelling of 40112081 in words is "forty million, one hundred twelve thousand, eighty-one".