2001215 has 4 divisors (see below), whose sum is σ = 2401464. Its totient is φ = 1600968.

The previous prime is 2001211. The next prime is 2001229. The reversal of 2001215 is 5121002.

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 2001215 - 2² = 2001211 is a prime.

It is a super-2 number, since 2×2001215² = 8009722952450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001196 and 2001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001211) 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, 200117 + ... + 200126.

It is an arithmetic number, because the mean of its divisors is an integer number (600366).

2^2001215 is an apocalyptic number.

2001215 is a deficient number, since it is larger than the sum of its proper divisors (400249).

2001215 is an equidigital number, since it uses as much as digits as its factorization.

2001215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400248.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 2001215 is about 1414.6430645219. The cubic root of 2001215 is about 126.0176132260.

Adding to 2001215 its reverse (5121002), we get a palindrome (7122217).

The spelling of 2001215 in words is "two million, one thousand, two hundred fifteen".