2221272 has 24 divisors (see below), whose sum is σ = 6016140. Its totient is φ = 740400.

The previous prime is 2221259. The next prime is 2221273. The reversal of 2221272 is 2721222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15354 + ... + 15497.

2^2221272 is an apocalyptic number.

It is an amenable number.

2221272 is an abundant number, since it is smaller than the sum of its proper divisors (3794868).

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

2221272 is a wasteful number, since it uses less digits than its factorization.

2221272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30863 (or 30856 counting only the distinct ones).

The product of its digits is 224, while the sum is 18.

The square root of 2221272 is about 1490.3932366996. The cubic root of 2221272 is about 130.4769854161.

Adding to 2221272 its reverse (2721222), we get a palindrome (4942494).

The spelling of 2221272 in words is "two million, two hundred twenty-one thousand, two hundred seventy-two".