40442215 has 16 divisors (see below), whose sum is σ = 53091360. Its totient is φ = 29329920.

The previous prime is 40442209. The next prime is 40442243. The reversal of 40442215 is 51224404.

It is a happy number.

40442215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40442215 - 2⁵ = 40442183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24331 + ... + 25939.

It is an arithmetic number, because the mean of its divisors is an integer number (3318210).

Almost surely, 2^40442215 is an apocalyptic number.

40442215 is a deficient number, since it is larger than the sum of its proper divisors (12649145).

40442215 is a wasteful number, since it uses less digits than its factorization.

40442215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 40442215 is about 6359.4193917370. The cubic root of 40442215 is about 343.2508683292.

Adding to 40442215 its reverse (51224404), we get a palindrome (91666619).

The spelling of 40442215 in words is "forty million, four hundred forty-two thousand, two hundred fifteen".