40042215 has 64 divisors (see below), whose sum is σ = 76377600. Its totient is φ = 19844352.

The previous prime is 40042213. The next prime is 40042229. The reversal of 40042215 is 51224004.

It is not a de Polignac number, because 40042215 - 2¹ = 40042213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40042213) 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 63 ways as a sum of consecutive naturals, for example, 171739 + ... + 171971.

It is an arithmetic number, because the mean of its divisors is an integer number (1193400).

Almost surely, 2^40042215 is an apocalyptic number.

40042215 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40042215 is a deficient number, since it is larger than the sum of its proper divisors (36335385).

40042215 is a wasteful number, since it uses less digits than its factorization.

40042215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40042215 is about 6327.8918290375. The cubic root of 40042215 is about 342.1154580934.

Adding to 40042215 its reverse (51224004), we get a palindrome (91266219).

The spelling of 40042215 in words is "forty million, forty-two thousand, two hundred fifteen".