2213540 has 48 divisors (see below), whose sum is σ = 5400192. Its totient is φ = 746496.

The previous prime is 2213537. The next prime is 2213551. The reversal of 2213540 is 453122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13499 + ... + 13661.

It is an arithmetic number, because the mean of its divisors is an integer number (112504).

2^2213540 is an apocalyptic number.

2213540 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 2213540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2700096).

2213540 is an abundant number, since it is smaller than the sum of its proper divisors (3186652).

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

2213540 is a wasteful number, since it uses less digits than its factorization.

2213540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 2213540 is about 1487.7970291676. The cubic root of 2213540 is about 130.3254174732.

Adding to 2213540 its reverse (453122), we get a palindrome (2666662).

The spelling of 2213540 in words is "two million, two hundred thirteen thousand, five hundred forty".