40506503 has 4 divisors (see below), whose sum is σ = 40525680. Its totient is φ = 40487328.

The previous prime is 40506497. The next prime is 40506511. The reversal of 40506503 is 30560504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40506503 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 (40506593) 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, 5963 + ... + 10796.

It is an arithmetic number, because the mean of its divisors is an integer number (10131420).

Almost surely, 2^40506503 is an apocalyptic number.

40506503 is a deficient number, since it is larger than the sum of its proper divisors (19177).

40506503 is a wasteful number, since it uses less digits than its factorization.

40506503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19176.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 40506503 is about 6364.4719341042. The cubic root of 40506503 is about 343.4326522187.

The spelling of 40506503 in words is "forty million, five hundred six thousand, five hundred three".