2561371303 has 8 divisors (see below), whose sum is σ = 2572613120. Its totient is φ = 2550148920.

The previous prime is 2561371289. The next prime is 2561371331. The reversal of 2561371303 is 3031731652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2561371303 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 (2561371003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300028 + ... + 308446.

It is an arithmetic number, because the mean of its divisors is an integer number (321576640).

Almost surely, 2^2561371303 is an apocalyptic number.

2561371303 is a deficient number, since it is larger than the sum of its proper divisors (11241817).

2561371303 is an equidigital number, since it uses as much as digits as its factorization.

2561371303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9717.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 2561371303 is about 50609.9921260614. The cubic root of 2561371303 is about 1368.2249736515.

The spelling of 2561371303 in words is "two billion, five hundred sixty-one million, three hundred seventy-one thousand, three hundred three".