2543320 has 64 divisors (see below), whose sum is σ = 6340320. Its totient is φ = 912384.

The previous prime is 2543309. The next prime is 2543323. The reversal of 2543320 is 233452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543323) 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, 34804 + ... + 34876.

2^2543320 is an apocalyptic number.

2543320 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 2543320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3170160).

2543320 is an abundant number, since it is smaller than the sum of its proper divisors (3797000).

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

2543320 is a wasteful number, since it uses less digits than its factorization.

2543320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 2543320 is about 1594.7789815520. The cubic root of 2543320 is about 136.5003197853.

Adding to 2543320 its reverse (233452), we get a palindrome (2776772).

The spelling of 2543320 in words is "two million, five hundred forty-three thousand, three hundred twenty".