2221340 has 48 divisors (see below), whose sum is σ = 5322240. Its totient is φ = 770880.

The previous prime is 2221333. The next prime is 2221343. The reversal of 2221340 is 431222.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4841 + ... + 5279.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2^2221340 is an apocalyptic number.

2221340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2661120).

2221340 is an abundant number, since it is smaller than the sum of its proper divisors (3100900).

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

2221340 is a wasteful number, since it uses less digits than its factorization.

2221340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2221340 is about 1490.4160492963. The cubic root of 2221340 is about 130.4783168371.

Adding to 2221340 its reverse (431222), we get a palindrome (2652562).

The spelling of 2221340 in words is "two million, two hundred twenty-one thousand, three hundred forty".