40558081 has 4 divisors (see below), whose sum is σ = 40575664. Its totient is φ = 40540500.

The previous prime is 40558079. The next prime is 40558087. The reversal of 40558081 is 18085504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40558081 - 2¹ = 40558079 is a prime.

It is a super-2 number, since 2×40558081² = 3289915868805122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40558087) 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, 4695 + ... + 10156.

It is an arithmetic number, because the mean of its divisors is an integer number (10143916).

Almost surely, 2^40558081 is an apocalyptic number.

It is an amenable number.

40558081 is a deficient number, since it is larger than the sum of its proper divisors (17583).

40558081 is a wasteful number, since it uses less digits than its factorization.

40558081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17582.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 40558081 is about 6368.5226701332. The cubic root of 40558081 is about 343.5783576812.

The spelling of 40558081 in words is "forty million, five hundred fifty-eight thousand, eighty-one".