2552220 has 72 divisors (see below), whose sum is σ = 8452080. Its totient is φ = 618240.

The previous prime is 2552219. The next prime is 2552233. The reversal of 2552220 is 222552.

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 = 2552193 and 2552202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1336 + ... + 2624.

It is an arithmetic number, because the mean of its divisors is an integer number (117390).

2^2552220 is an apocalyptic number.

2552220 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 2552220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4226040).

2552220 is an abundant number, since it is smaller than the sum of its proper divisors (5899860).

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

2552220 is a wasteful number, since it uses less digits than its factorization.

2552220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 2552220 is about 1597.5669000076. The cubic root of 2552220 is about 136.6593558122.

Adding to 2552220 its reverse (222552), we get a palindrome (2774772).

It can be divided in two parts, 2552 and 220, that added together give a palindrome (2772).

The spelling of 2552220 in words is "two million, five hundred fifty-two thousand, two hundred twenty".