40818215 has 32 divisors (see below), whose sum is σ = 53778816. Its totient is φ = 29652480.

The previous prime is 40818187. The next prime is 40818229. The reversal of 40818215 is 51281804.

It is not a de Polignac number, because 40818215 - 2¹² = 40814119 is a prime.

It is a super-2 number, since 2×40818215² = 3332253351572450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225425 + ... + 225605.

It is an arithmetic number, because the mean of its divisors is an integer number (1680588).

Almost surely, 2^40818215 is an apocalyptic number.

40818215 is a deficient number, since it is larger than the sum of its proper divisors (12960601).

40818215 is a wasteful number, since it uses less digits than its factorization.

40818215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 40818215 is about 6388.9134443973. The cubic root of 40818215 is about 344.3113477173.

The spelling of 40818215 in words is "forty million, eight hundred eighteen thousand, two hundred fifteen".