40555505 has 4 divisors (see below), whose sum is σ = 48666612. Its totient is φ = 32444400.

The previous prime is 40555499. The next prime is 40555507. The reversal of 40555505 is 50555504.

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 24039409 + 16516096 = 4903^2 + 4064^2 .

It is not a de Polignac number, because 40555505 - 2¹⁸ = 40293361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (40555507) 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, 4055546 + ... + 4055555.

It is an arithmetic number, because the mean of its divisors is an integer number (12166653).

Almost surely, 2^40555505 is an apocalyptic number.

It is an amenable number.

40555505 is a deficient number, since it is larger than the sum of its proper divisors (8111107).

40555505 is an equidigital number, since it uses as much as digits as its factorization.

40555505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111106.

The product of its (nonzero) digits is 12500, while the sum is 29.

The square root of 40555505 is about 6368.3204222150. The cubic root of 40555505 is about 343.5710835321.

Subtracting 40555505 from its reverse (50555504), we obtain a palindrome (9999999).

The spelling of 40555505 in words is "forty million, five hundred fifty-five thousand, five hundred five".