2561100341 has 4 divisors (see below), whose sum is σ = 2561812812. Its totient is φ = 2560387872.

The previous prime is 2561100323. The next prime is 2561100361. The reversal of 2561100341 is 1430011652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40056241 + 2521044100 = 6329^2 + 50210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2561100341 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 (2561100361) 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, 350816 + ... + 358041.

It is an arithmetic number, because the mean of its divisors is an integer number (640453203).

Almost surely, 2^2561100341 is an apocalyptic number.

It is an amenable number.

2561100341 is a deficient number, since it is larger than the sum of its proper divisors (712471).

2561100341 is an equidigital number, since it uses as much as digits as its factorization.

2561100341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712470.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2561100341 is about 50607.3150937688. The cubic root of 2561100341 is about 1368.1767247507.

Adding to 2561100341 its reverse (1430011652), we get a palindrome (3991111993).

The spelling of 2561100341 in words is "two billion, five hundred sixty-one million, one hundred thousand, three hundred forty-one".