2221515 has 12 divisors (see below), whose sum is σ = 3850704. Its totient is φ = 1184784.

The previous prime is 2221511. The next prime is 2221523. The reversal of 2221515 is 5151222.

It is not a de Polignac number, because 2221515 - 2² = 2221511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24639 + ... + 24728.

It is an arithmetic number, because the mean of its divisors is an integer number (320892).

2^2221515 is an apocalyptic number.

2221515 is a deficient number, since it is larger than the sum of its proper divisors (1629189).

2221515 is a wasteful number, since it uses less digits than its factorization.

2221515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49378 (or 49375 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 2221515 is about 1490.4747565793. The cubic root of 2221515 is about 130.4817431632.

Adding to 2221515 its reverse (5151222), we get a palindrome (7372737).

The spelling of 2221515 in words is "two million, two hundred twenty-one thousand, five hundred fifteen".