2204581 has 4 divisors (see below), whose sum is σ = 2207692. Its totient is φ = 2201472.

The previous prime is 2204561. The next prime is 2204591. The reversal of 2204581 is 1854022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2056356 + 148225 = 1434^2 + 385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2204581 - 2⁷ = 2204453 is a prime.

It is a super-2 number, since 2×2204581² = 9720354771122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2204561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85 + ... + 2101.

It is an arithmetic number, because the mean of its divisors is an integer number (551923).

2^2204581 is an apocalyptic number.

It is an amenable number.

2204581 is a deficient number, since it is larger than the sum of its proper divisors (3111).

2204581 is a wasteful number, since it uses less digits than its factorization.

2204581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2204581 is about 1484.7831491501. The cubic root of 2204581 is about 130.1493549699.

The spelling of 2204581 in words is "two million, two hundred four thousand, five hundred eighty-one".