40805155 has 4 divisors (see below), whose sum is σ = 48966192. Its totient is φ = 32644120.

The previous prime is 40805143. The next prime is 40805161. The reversal of 40805155 is 55150804.

40805155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 40805155 - 2⁵ = 40805123 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4080511 + ... + 4080520.

It is an arithmetic number, because the mean of its divisors is an integer number (12241548).

Almost surely, 2^40805155 is an apocalyptic number.

40805155 is a deficient number, since it is larger than the sum of its proper divisors (8161037).

40805155 is an equidigital number, since it uses as much as digits as its factorization.

40805155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8161036.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 40805155 is about 6387.8912796008. The cubic root of 40805155 is about 344.2746223986.

Adding to 40805155 its reverse (55150804), we get a palindrome (95955959).

The spelling of 40805155 in words is "forty million, eight hundred five thousand, one hundred fifty-five".