40555553 has 4 divisors (see below), whose sum is σ = 40643988. Its totient is φ = 40467120.

The previous prime is 40555549. The next prime is 40555577. The reversal of 40555553 is 35555504.

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 7573504 + 32982049 = 2752^2 + 5743^2 .

It is a cyclic number.

It is not a de Polignac number, because 40555553 - 2² = 40555549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40555513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43526 + ... + 44447.

It is an arithmetic number, because the mean of its divisors is an integer number (10160997).

Almost surely, 2^40555553 is an apocalyptic number.

It is an amenable number.

40555553 is a deficient number, since it is larger than the sum of its proper divisors (88435).

40555553 is an equidigital number, since it uses as much as digits as its factorization.

40555553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88434.

The product of its (nonzero) digits is 37500, while the sum is 32.

The square root of 40555553 is about 6368.3241908684. The cubic root of 40555553 is about 343.5712190780.

The spelling of 40555553 in words is "forty million, five hundred fifty-five thousand, five hundred fifty-three".