2051215 has 4 divisors (see below), whose sum is σ = 2461464. Its totient is φ = 1640968.

The previous prime is 2051191. The next prime is 2051219. The reversal of 2051215 is 5121502.

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 2051215 - 2⁷ = 2051087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051219) 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, 205117 + ... + 205126.

It is an arithmetic number, because the mean of its divisors is an integer number (615366).

2^2051215 is an apocalyptic number.

2051215 is a deficient number, since it is larger than the sum of its proper divisors (410249).

2051215 is an equidigital number, since it uses as much as digits as its factorization.

2051215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410248.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2051215 is about 1432.2063398826. The cubic root of 2051215 is about 127.0585011650.

Adding to 2051215 its reverse (5121502), we get a palindrome (7172717).

The spelling of 2051215 in words is "two million, fifty-one thousand, two hundred fifteen".