2303561 has 8 divisors (see below), whose sum is σ = 2513280. Its totient is φ = 2098512.

The previous prime is 2303533. The next prime is 2303563. The reversal of 2303561 is 1653032.

2303561 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2303561 - 2¹⁰ = 2302537 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2303563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95 + ... + 2148.

It is an arithmetic number, because the mean of its divisors is an integer number (314160).

2^2303561 is an apocalyptic number.

It is an amenable number.

2303561 is a deficient number, since it is larger than the sum of its proper divisors (209719).

2303561 is a wasteful number, since it uses less digits than its factorization.

2303561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 2303561 is about 1517.7486616696. The cubic root of 2303561 is about 132.0687008462.

Adding to 2303561 its reverse (1653032), we get a palindrome (3956593).

The spelling of 2303561 in words is "two million, three hundred three thousand, five hundred sixty-one".