2221764 has 24 divisors (see below), whose sum is σ = 5489568. Its totient is φ = 696960.

The previous prime is 2221757. The next prime is 2221771. The reversal of 2221764 is 4671222.

It is an interprime number because it is at equal distance from previous prime (2221757) and next prime (2221771).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5242 + ... + 5649.

It is an arithmetic number, because the mean of its divisors is an integer number (228732).

2^2221764 is an apocalyptic number.

It is an amenable number.

2221764 is an abundant number, since it is smaller than the sum of its proper divisors (3267804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221764 is a wasteful number, since it uses less digits than its factorization.

2221764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10915 (or 10913 counting only the distinct ones).

The product of its digits is 1344, while the sum is 24.

The square root of 2221764 is about 1490.5582846705. The cubic root of 2221764 is about 130.4866180256.

Adding to 2221764 its reverse (4671222), we get a palindrome (6892986).

The spelling of 2221764 in words is "two million, two hundred twenty-one thousand, seven hundred sixty-four".