2221215 has 16 divisors (see below), whose sum is σ = 3572448. Its totient is φ = 1178496.

The previous prime is 2221187. The next prime is 2221217. The reversal of 2221215 is 5121222.

It is not a de Polignac number, because 2221215 - 2⁵ = 2221183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

2221215 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2221194 and 2221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5397 + ... + 5793.

It is an arithmetic number, because the mean of its divisors is an integer number (223278).

2^2221215 is an apocalyptic number.

2221215 is a deficient number, since it is larger than the sum of its proper divisors (1351233).

2221215 is a wasteful number, since it uses less digits than its factorization.

2221215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778.

The product of its digits is 80, while the sum is 15.

The square root of 2221215 is about 1490.3741141069. The cubic root of 2221215 is about 130.4758693511.

Adding to 2221215 its reverse (5121222), we get a palindrome (7342437).

The spelling of 2221215 in words is "two million, two hundred twenty-one thousand, two hundred fifteen".