2561106203 has 8 divisors (see below), whose sum is σ = 2663297280. Its totient is φ = 2459840320.

The previous prime is 2561106193. The next prime is 2561106221. The reversal of 2561106203 is 3026011652.

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

It is not a de Polignac number, because 2561106203 - 2⁶ = 2561106139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2561106283) 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, 225650 + ... + 236727.

It is an arithmetic number, because the mean of its divisors is an integer number (332912160).

Almost surely, 2^2561106203 is an apocalyptic number.

2561106203 is a deficient number, since it is larger than the sum of its proper divisors (102191077).

2561106203 is a wasteful number, since it uses less digits than its factorization.

2561106203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462597.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2561106203 is about 50607.3730102640. The cubic root of 2561106203 is about 1368.1777686049.

Adding to 2561106203 its reverse (3026011652), we get a palindrome (5587117855).

The spelling of 2561106203 in words is "two billion, five hundred sixty-one million, one hundred six thousand, two hundred three".