2555520 has 128 divisors (see below), whose sum is σ = 8959680. Its totient is φ = 619520.

The previous prime is 2555477. The next prime is 2555521. The reversal of 2555520 is 255552.

2555520 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232315 + ... + 232325.

2^2555520 is an apocalyptic number.

2555520 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 2555520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4479840).

2555520 is an abundant number, since it is smaller than the sum of its proper divisors (6404160).

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

2555520 is an equidigital number, since it uses as much as digits as its factorization.

2555520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 2555520 is about 1598.5993869635. The cubic root of 2555520 is about 136.7182302620.

Subtracting from 2555520 its reverse (255552), we obtain a cube (2299968 = 132³).

It can be divided in two parts, 255 and 5520, that added together give a palindrome (5775).

The spelling of 2555520 in words is "two million, five hundred fifty-five thousand, five hundred twenty".