40113081 has 24 divisors (see below), whose sum is σ = 64022400. Its totient is φ = 24072576.

The previous prime is 40113053. The next prime is 40113131. The reversal of 40113081 is 18031104.

It is not a de Polignac number, because 40113081 - 2⁵ = 40113049 is a prime.

It is a super-2 number, since 2×40113081² = 3218118534625122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40113581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2181 + ... + 9218.

It is an arithmetic number, because the mean of its divisors is an integer number (2667600).

Almost surely, 2^40113081 is an apocalyptic number.

It is an amenable number.

40113081 is a deficient number, since it is larger than the sum of its proper divisors (23909319).

40113081 is a wasteful number, since it uses less digits than its factorization.

40113081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11445 (or 11442 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 40113081 is about 6333.4888489678. The cubic root of 40113081 is about 342.3171624337.

Adding to 40113081 its reverse (18031104), we get a palindrome (58144185).

The spelling of 40113081 in words is "forty million, one hundred thirteen thousand, eighty-one".