40818015 has 24 divisors (see below), whose sum is σ = 80859168. Its totient is φ = 18659520.

The previous prime is 40818013. The next prime is 40818047. The reversal of 40818015 is 51081804.

40818015 = 1701² + 1702² + ... + 1714².

It is not a de Polignac number, because 40818015 - 2¹ = 40818013 is a prime.

It is a super-2 number, since 2×40818015² = 3332220697080450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40818015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40818013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64476 + ... + 65105.

It is an arithmetic number, because the mean of its divisors is an integer number (3369132).

Almost surely, 2^40818015 is an apocalyptic number.

40818015 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40818015 is a deficient number, since it is larger than the sum of its proper divisors (40041153).

40818015 is a wasteful number, since it uses less digits than its factorization.

40818015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129599 (or 129596 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 40818015 is about 6388.8977922643. The cubic root of 40818015 is about 344.3107853672.

Adding to 40818015 its reverse (51081804), we get a palindrome (91899819).

The spelling of 40818015 in words is "forty million, eight hundred eighteen thousand, fifteen".