40013215 has 32 divisors (see below), whose sum is σ = 55904256. Its totient is φ = 27202560.

The previous prime is 40013201. The next prime is 40013227. The reversal of 40013215 is 51231004.

It is not a de Polignac number, because 40013215 - 2⁹ = 40012703 is a prime.

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, 59119 + ... + 59791.

It is an arithmetic number, because the mean of its divisors is an integer number (1747008).

Almost surely, 2^40013215 is an apocalyptic number.

40013215 is a deficient number, since it is larger than the sum of its proper divisors (15891041).

40013215 is a wasteful number, since it uses less digits than its factorization.

40013215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 40013215 is about 6325.5999715442. The cubic root of 40013215 is about 342.0328474088.

Adding to 40013215 its reverse (51231004), we get a palindrome (91244219).

The spelling of 40013215 in words is "forty million, thirteen thousand, two hundred fifteen".