40515555 has 24 divisors (see below), whose sum is σ = 66658032. Its totient is φ = 21013632.

The previous prime is 40515533. The next prime is 40515569. The reversal of 40515555 is 55551504.

It is not a de Polignac number, because 40515555 - 2⁶ = 40515491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19549 + ... + 21521.

It is an arithmetic number, because the mean of its divisors is an integer number (2777418).

Almost surely, 2^40515555 is an apocalyptic number.

40515555 is a deficient number, since it is larger than the sum of its proper divisors (26142477).

40515555 is a wasteful number, since it uses less digits than its factorization.

40515555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 40515555 is about 6365.1830295758. The cubic root of 40515555 is about 343.4582326448.

The spelling of 40515555 in words is "forty million, five hundred fifteen thousand, five hundred fifty-five".