2561023241 has 8 divisors (see below), whose sum is σ = 2927518080. Its totient is φ = 2194687008.

The previous prime is 2561023217. The next prime is 2561023249. The reversal of 2561023241 is 1423201652.

It is a happy number.

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-2561023241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2561023241.

It is not an unprimeable number, because it can be changed into a prime (2561023249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2756 + ... + 71621.

It is an arithmetic number, because the mean of its divisors is an integer number (365939760).

Almost surely, 2^2561023241 is an apocalyptic number.

It is an amenable number.

2561023241 is a deficient number, since it is larger than the sum of its proper divisors (366494839).

2561023241 is an equidigital number, since it uses as much as digits as its factorization.

2561023241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79303.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 2561023241 is about 50606.5533404519. The cubic root of 2561023241 is about 1368.1629953025.

Adding to 2561023241 its reverse (1423201652), we get a palindrome (3984224893).

The spelling of 2561023241 in words is "two billion, five hundred sixty-one million, twenty-three thousand, two hundred forty-one".