2543220 has 72 divisors (see below), whose sum is σ = 7862400. Its totient is φ = 665280.

The previous prime is 2543201. The next prime is 2543221. The reversal of 2543220 is 223452.

2543220 is digitally balanced in base 5, 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 (18).

It is a junction number, because it is equal to n+sod(n) for n = 2543193 and 2543202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543221) 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, 12681 + ... + 12879.

It is an arithmetic number, because the mean of its divisors is an integer number (109200).

2^2543220 is an apocalyptic number.

2543220 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 2543220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3931200).

2543220 is an abundant number, since it is smaller than the sum of its proper divisors (5319180).

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

2543220 is a wasteful number, since it uses less digits than its factorization.

2543220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 2543220 is about 1594.7476289369. The cubic root of 2543220 is about 136.4985307574.

Adding to 2543220 its reverse (223452), we get a palindrome (2766672).

It can be divided in two parts, 25432 and 20, that added together give a palindrome (25452).

The spelling of 2543220 in words is "two million, five hundred forty-three thousand, two hundred twenty".