2203261 has 4 divisors (see below), whose sum is σ = 2212092. Its totient is φ = 2194432.

The previous prime is 2203249. The next prime is 2203291. The reversal of 2203261 is 1623022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1623022 = 2 ⋅811511.

It can be written as a sum of positive squares in 2 ways, for example, as 1610361 + 592900 = 1269^2 + 770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2203261 - 2⁷ = 2203133 is a prime.

It is a Duffinian number.

2203261 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2203211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4030 + ... + 4543.

It is an arithmetic number, because the mean of its divisors is an integer number (553023).

2^2203261 is an apocalyptic number.

It is an amenable number.

2203261 is a deficient number, since it is larger than the sum of its proper divisors (8831).

2203261 is an equidigital number, since it uses as much as digits as its factorization.

2203261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8830.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2203261 is about 1484.3385732373. The cubic root of 2203261 is about 130.1233740015.

Adding to 2203261 its reverse (1623022), we get a palindrome (3826283).

It can be divided in two parts, 220 and 3261, that added together give a square (3481 = 59²).

The spelling of 2203261 in words is "two million, two hundred three thousand, two hundred sixty-one".