2271220 has 24 divisors (see below), whose sum is σ = 5451264. Its totient is φ = 778656.

The previous prime is 2271163. The next prime is 2271221. The reversal of 2271220 is 221722.

2271220 = T₂₉ + T₃₀ + ... + T₂₃₈.

2271220 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

2271220 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 2271194 and 2271203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2271221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7972 + ... + 8251.

It is an arithmetic number, because the mean of its divisors is an integer number (227136).

2^2271220 is an apocalyptic number.

2271220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2271220 is an abundant number, since it is smaller than the sum of its proper divisors (3180044).

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

2271220 is a wasteful number, since it uses less digits than its factorization.

2271220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16239 (or 16237 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 2271220 is about 1507.0567341676. The cubic root of 2271220 is about 131.4477231520.

Adding to 2271220 its reverse (221722), we get a palindrome (2492942).

The spelling of 2271220 in words is "two million, two hundred seventy-one thousand, two hundred twenty".