2511220 has 24 divisors (see below), whose sum is σ = 5305608. Its totient is φ = 998400.

The previous prime is 2511169. The next prime is 2511241. The reversal of 2511220 is 221152.

2511220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 285156 + 2226064 = 534^2 + 1492^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2511220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4560 + ... + 5080.

It is an arithmetic number, because the mean of its divisors is an integer number (221067).

2^2511220 is an apocalyptic number.

2511220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2511220 is an abundant number, since it is smaller than the sum of its proper divisors (2794388).

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

2511220 is a wasteful number, since it uses less digits than its factorization.

2511220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 769 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 2511220 is about 1584.6829335864. The cubic root of 2511220 is about 135.9236162770.

Adding to 2511220 its reverse (221152), we get a palindrome (2732372).

The spelling of 2511220 in words is "two million, five hundred eleven thousand, two hundred twenty".