2205522 has 64 divisors (see below), whose sum is σ = 5529600. Its totient is φ = 645840.

The previous prime is 2205521. The next prime is 2205527. The reversal of 2205522 is 2255022.

Added to its reverse (2255022) it gives a square (4460544 = 2112²).

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 = 2205495 and 2205504.

It is not an unprimeable number, because it can be changed into a prime (2205521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27879 + ... + 27957.

It is an arithmetic number, because the mean of its divisors is an integer number (86400).

2^2205522 is an apocalyptic number.

2205522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2205522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2764800).

2205522 is an abundant number, since it is smaller than the sum of its proper divisors (3324078).

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

2205522 is a wasteful number, since it uses less digits than its factorization.

2205522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 142 counting only the distinct ones).

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

The square root of 2205522 is about 1485.0999966332. The cubic root of 2205522 is about 130.1678699201.

Adding to 2205522 its reverse (2255022), we get a square (4460544 = 2112²).

The spelling of 2205522 in words is "two million, two hundred five thousand, five hundred twenty-two".