2261061311 has 2 divisors, whose sum is σ = 2261061312. Its totient is φ = 2261061310.

The previous prime is 2261061211. The next prime is 2261061343. The reversal of 2261061311 is 1131601622.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2261061311 - 2²² = 2256867007 is a prime.

It is a super-2 number, since 2×2261061311² = 10224796504202077442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261061371) 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 as a sum of consecutive naturals, namely, 1130530655 + 1130530656.

It is an arithmetic number, because the mean of its divisors is an integer number (1130530656).

Almost surely, 2^2261061311 is an apocalyptic number.

2261061311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261061311 is an equidigital number, since it uses as much as digits as its factorization.

2261061311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2261061311 is about 47550.6184081764. The cubic root of 2261061311 is about 1312.5145089976.

Adding to 2261061311 its reverse (1131601622), we get a palindrome (3392662933).

The spelling of 2261061311 in words is "two billion, two hundred sixty-one million, sixty-one thousand, three hundred eleven".