2221615 has 16 divisors (see below), whose sum is σ = 3004416. Its totient is φ = 1562400.

The previous prime is 2221589. The next prime is 2221631. The reversal of 2221615 is 5161222.

It is not a de Polignac number, because 2221615 - 2¹³ = 2213423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221592 and 2221601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1054 + ... + 2356.

It is an arithmetic number, because the mean of its divisors is an integer number (187776).

2^2221615 is an apocalyptic number.

2221615 is a deficient number, since it is larger than the sum of its proper divisors (782801).

2221615 is a wasteful number, since it uses less digits than its factorization.

2221615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350.

The product of its digits is 240, while the sum is 19.

The square root of 2221615 is about 1490.5083025599. The cubic root of 2221615 is about 130.4837009830.

Adding to 2221615 its reverse (5161222), we get a palindrome (7382837).

The spelling of 2221615 in words is "two million, two hundred twenty-one thousand, six hundred fifteen".