2211440220 has 72 divisors (see below), whose sum is σ = 7317863280. Its totient is φ = 536106240.

The previous prime is 2211440207. The next prime is 2211440221. The reversal of 2211440220 is 220441122.

2211440220 is a `hidden beast` number, since 2 + 2 + 1 + 1 + 440 + 220 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 2211440193 and 2211440202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211440221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 556465 + ... + 560424.

It is an arithmetic number, because the mean of its divisors is an integer number (101636990).

Almost surely, 2^2211440220 is an apocalyptic number.

2211440220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211440220 is an abundant number, since it is smaller than the sum of its proper divisors (5106423060).

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

2211440220 is a wasteful number, since it uses less digits than its factorization.

2211440220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116915 (or 1116910 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2211440220 is about 47025.9526219299. The cubic root of 2211440220 is about 1302.8419522574.

Adding to 2211440220 its reverse (220441122), we get a palindrome (2431881342).

It can be divided in two parts, 221 and 1440220, that added together give a palindrome (1440441).

The spelling of 2211440220 in words is "two billion, two hundred eleven million, four hundred forty thousand, two hundred twenty".