2205549 has 20 divisors (see below), whose sum is σ = 3348796. Its totient is φ = 1446336.

The previous prime is 2205547. The next prime is 2205551. The reversal of 2205549 is 9455022.

It is an interprime number because it is at equal distance from previous prime (2205547) and next prime (2205551).

It can be written as a sum of positive squares in 2 ways, for example, as 1225449 + 980100 = 1107^2 + 990^2 .

It is not a de Polignac number, because 2205549 - 2¹ = 2205547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

2205549 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205547) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5727 + ... + 6099.

2^2205549 is an apocalyptic number.

It is an amenable number.

2205549 is a deficient number, since it is larger than the sum of its proper divisors (1143247).

2205549 is an equidigital number, since it uses as much as digits as its factorization.

2205549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 2205549 is about 1485.1090869024. The cubic root of 2205549 is about 130.1684010896.

The spelling of 2205549 in words is "two million, two hundred five thousand, five hundred forty-nine".