40215211 has 4 divisors (see below), whose sum is σ = 40247424. Its totient is φ = 40183000.

The previous prime is 40215193. The next prime is 40215233. The reversal of 40215211 is 11251204.

40215211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40215211 - 2¹⁷ = 40084139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40219211) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14155 + ... + 16756.

It is an arithmetic number, because the mean of its divisors is an integer number (10061856).

Almost surely, 2^40215211 is an apocalyptic number.

40215211 is a deficient number, since it is larger than the sum of its proper divisors (32213).

40215211 is a wasteful number, since it uses less digits than its factorization.

40215211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32212.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 40215211 is about 6341.5464202354. The cubic root of 40215211 is about 342.6074353498.

Adding to 40215211 its reverse (11251204), we get a palindrome (51466415).

The spelling of 40215211 in words is "forty million, two hundred fifteen thousand, two hundred eleven".