2221755 has 16 divisors (see below), whose sum is σ = 3605280. Its totient is φ = 1168128.

The previous prime is 2221753. The next prime is 2221757. The reversal of 2221755 is 5571222.

It is an interprime number because it is at equal distance from previous prime (2221753) and next prime (2221757).

It is not a de Polignac number, because 2221755 - 2¹ = 2221753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81 + ... + 2109.

It is an arithmetic number, because the mean of its divisors is an integer number (225330).

2^2221755 is an apocalyptic number.

2221755 is a deficient number, since it is larger than the sum of its proper divisors (1383525).

2221755 is a wasteful number, since it uses less digits than its factorization.

2221755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110.

The product of its digits is 1400, while the sum is 24.

The square root of 2221755 is about 1490.5552656644. Note that the first 3 decimals coincide. The cubic root of 2221755 is about 130.4864418321.

Adding to 2221755 its reverse (5571222), we get a palindrome (7792977).

The spelling of 2221755 in words is "two million, two hundred twenty-one thousand, seven hundred fifty-five".