40355081 has 4 divisors (see below), whose sum is σ = 43459332. Its totient is φ = 37250832.

The previous prime is 40355071. The next prime is 40355083. The reversal of 40355081 is 18055304.

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 12845056 + 27510025 = 3584^2 + 5245^2 .

It is a cyclic number.

It is not a de Polignac number, because 40355081 - 2¹⁸ = 40092937 is a prime.

It is a super-2 number, since 2×40355081² = 3257065125033122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40355081.

It is not an unprimeable number, because it can be changed into a prime (40355083) 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, 1552106 + ... + 1552131.

It is an arithmetic number, because the mean of its divisors is an integer number (10864833).

Almost surely, 2^40355081 is an apocalyptic number.

It is an amenable number.

40355081 is a deficient number, since it is larger than the sum of its proper divisors (3104251).

40355081 is a wasteful number, since it uses less digits than its factorization.

40355081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104250.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 40355081 is about 6352.5649150560. The cubic root of 40355081 is about 343.0041762136.

The spelling of 40355081 in words is "forty million, three hundred fifty-five thousand, eighty-one".