40243555 has 16 divisors (see below), whose sum is σ = 52840800. Its totient is φ = 29180160.

The previous prime is 40243547. The next prime is 40243579. The reversal of 40243555 is 55534204.

It is not a de Polignac number, because 40243555 - 2³ = 40243547 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 21601 + ... + 23389.

It is an arithmetic number, because the mean of its divisors is an integer number (3302550).

Almost surely, 2^40243555 is an apocalyptic number.

40243555 is a deficient number, since it is larger than the sum of its proper divisors (12597245).

40243555 is a wasteful number, since it uses less digits than its factorization.

40243555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 40243555 is about 6343.7808127331. The cubic root of 40243555 is about 342.6879072605.

Adding to 40243555 its reverse (55534204), we get a palindrome (95777759).

The spelling of 40243555 in words is "forty million, two hundred forty-three thousand, five hundred fifty-five".