2561097211 has 2 divisors, whose sum is σ = 2561097212. Its totient is φ = 2561097210.

The previous prime is 2561097199. The next prime is 2561097221. The reversal of 2561097211 is 1127901652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2561097211 - 2²⁹ = 2024226299 is a prime.

It is not a weakly prime, because it can be changed into another prime (2561097221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280548605 + 1280548606.

It is an arithmetic number, because the mean of its divisors is an integer number (1280548606).

Almost surely, 2^2561097211 is an apocalyptic number.

2561097211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2561097211 is an equidigital number, since it uses as much as digits as its factorization.

2561097211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 2561097211 is about 50607.2841693762. The cubic root of 2561097211 is about 1368.1761673868.

Adding to 2561097211 its reverse (1127901652), we get a palindrome (3688998863).

The spelling of 2561097211 in words is "two billion, five hundred sixty-one million, ninety-seven thousand, two hundred eleven".