40506517 has 4 divisors (see below), whose sum is σ = 40521280. Its totient is φ = 40491756.

The previous prime is 40506511. The next prime is 40506569. The reversal of 40506517 is 71560504.

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 40506517 - 2¹⁵ = 40473749 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 (40506511) 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, 1917 + ... + 9202.

It is an arithmetic number, because the mean of its divisors is an integer number (10130320).

Almost surely, 2^40506517 is an apocalyptic number.

It is an amenable number.

40506517 is a deficient number, since it is larger than the sum of its proper divisors (14763).

40506517 is a wasteful number, since it uses less digits than its factorization.

40506517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14762.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 40506517 is about 6364.4730339597. The cubic root of 40506517 is about 343.4326917848.

The spelling of 40506517 in words is "forty million, five hundred six thousand, five hundred seventeen".