2775222 has 40 divisors (see below), whose sum is σ = 6400416. Its totient is φ = 898128.

The previous prime is 2775221. The next prime is 2775247. The reversal of 2775222 is 2225772.

It is a happy number.

2775222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2775221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5763 + ... + 6225.

2^2775222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2775222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3200208).

2775222 is an abundant number, since it is smaller than the sum of its proper divisors (3625194).

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

2775222 is a wasteful number, since it uses less digits than its factorization.

2775222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 505 counting only the distinct ones).

The product of its digits is 3920, while the sum is 27.

The square root of 2775222 is about 1665.8997568882. The cubic root of 2775222 is about 140.5289851253.

The spelling of 2775222 in words is "two million, seven hundred seventy-five thousand, two hundred twenty-two".