2221505 has 24 divisors (see below), whose sum is σ = 3162240. Its totient is φ = 1485120.

The previous prime is 2221459. The next prime is 2221507. The reversal of 2221505 is 5051222.

It is not a de Polignac number, because 2221505 - 2⁸ = 2221249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9176 + ... + 9414.

It is an arithmetic number, because the mean of its divisors is an integer number (131760).

2^2221505 is an apocalyptic number.

It is an amenable number.

2221505 is a deficient number, since it is larger than the sum of its proper divisors (940735).

2221505 is a wasteful number, since it uses less digits than its factorization.

2221505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 2221505 is about 1490.4714019397. The cubic root of 2221505 is about 130.4815473780.

Adding to 2221505 its reverse (5051222), we get a palindrome (7272727).

The spelling of 2221505 in words is "two million, two hundred twenty-one thousand, five hundred five".