2561303 has 8 divisors (see below), whose sum is σ = 2691168. Its totient is φ = 2433024.

The previous prime is 2561291. The next prime is 2561323. The reversal of 2561303 is 3031652.

2561303 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2561303 - 2⁶ = 2561239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4151 + ... + 4727.

It is an arithmetic number, because the mean of its divisors is an integer number (336396).

2^2561303 is an apocalyptic number.

2561303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2561303 is a deficient number, since it is larger than the sum of its proper divisors (129865).

2561303 is a wasteful number, since it uses less digits than its factorization.

2561303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793.

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

The square root of 2561303 is about 1600.4071357002. The cubic root of 2561303 is about 136.8212811585.

Adding to 2561303 its reverse (3031652), we get a palindrome (5592955).

The spelling of 2561303 in words is "two million, five hundred sixty-one thousand, three hundred three".