4000215 has 8 divisors (see below), whose sum is σ = 6400368. Its totient is φ = 2133440.

The previous prime is 4000189. The next prime is 4000237. The reversal of 4000215 is 5120004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4000215 - 2⁹ = 3999703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4000215.

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 7 ways as a sum of consecutive naturals, for example, 133326 + ... + 133355.

It is an arithmetic number, because the mean of its divisors is an integer number (800046).

Almost surely, 2^4000215 is an apocalyptic number.

4000215 is a deficient number, since it is larger than the sum of its proper divisors (2400153).

4000215 is a wasteful number, since it uses less digits than its factorization.

4000215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266689.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 4000215 is about 2000.0537492778. The cubic root of 4000215 is about 158.7429492394.

Adding to 4000215 its reverse (5120004), we get a palindrome (9120219).

The spelling of 4000215 in words is "four million, two hundred fifteen", and thus it is an aban number.