2220815 has 16 divisors (see below), whose sum is σ = 2845920. Its totient is φ = 1658880.

The previous prime is 2220787. The next prime is 2220839. The reversal of 2220815 is 5180222.

2220815 = 223² + 224² + ... + 260².

2220815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2220815 - 2¹⁴ = 2204431 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9095 + ... + 9335.

It is an arithmetic number, because the mean of its divisors is an integer number (177870).

2^2220815 is an apocalyptic number.

2220815 is a deficient number, since it is larger than the sum of its proper divisors (625105).

2220815 is a wasteful number, since it uses less digits than its factorization.

2220815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2220815 is about 1490.2399135710. The cubic root of 2220815 is about 130.4680367788.

The spelling of 2220815 in words is "two million, two hundred twenty thousand, eight hundred fifteen".