40415509 has 4 divisors (see below), whose sum is σ = 40433760. Its totient is φ = 40397260.

The previous prime is 40415497. The next prime is 40415519. The reversal of 40415509 is 90551404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40415509 - 2²⁵ = 6861077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40415519) 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, 5257 + ... + 10414.

It is an arithmetic number, because the mean of its divisors is an integer number (10108440).

Almost surely, 2^40415509 is an apocalyptic number.

It is an amenable number.

40415509 is a deficient number, since it is larger than the sum of its proper divisors (18251).

40415509 is a wasteful number, since it uses less digits than its factorization.

40415509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18250.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 40415509 is about 6357.3193249985. The cubic root of 40415509 is about 343.1752965023.

The spelling of 40415509 in words is "forty million, four hundred fifteen thousand, five hundred nine".