2261311333 has 2 divisors, whose sum is σ = 2261311334. Its totient is φ = 2261311332.

The previous prime is 2261311331. The next prime is 2261311343. The reversal of 2261311333 is 3331131622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2208342049 + 52969284 = 46993^2 + 7278^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261311333 - 2¹ = 2261311331 is a prime.

It is a super-2 number, since 2×2261311333² = 10227057889508473778, which contains 22 as substring.

Together with 2261311331, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2261311298 and 2261311307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261311331) 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, 1130655666 + 1130655667.

It is an arithmetic number, because the mean of its divisors is an integer number (1130655667).

Almost surely, 2^2261311333 is an apocalyptic number.

It is an amenable number.

2261311333 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261311333 is an equidigital number, since it uses as much as digits as its factorization.

2261311333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 25.

The square root of 2261311333 is about 47553.2473444243. The cubic root of 2261311333 is about 1312.5628853074.

Adding to 2261311333 its reverse (3331131622), we get a palindrome (5592442955).

The spelling of 2261311333 in words is "two billion, two hundred sixty-one million, three hundred eleven thousand, three hundred thirty-three".