2261240909 has 2 divisors, whose sum is σ = 2261240910. Its totient is φ = 2261240908.

The previous prime is 2261240893. The next prime is 2261240959. The reversal of 2261240909 is 9090421622.

2261240909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2216055625 + 45185284 = 47075^2 + 6722^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261240909 - 2⁴ = 2261240893 is a prime.

It is a super-2 number, since 2×2261240909² = 10226420897070292562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261240959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130620454 + 1130620455.

It is an arithmetic number, because the mean of its divisors is an integer number (1130620455).

Almost surely, 2^2261240909 is an apocalyptic number.

It is an amenable number.

2261240909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261240909 is an equidigital number, since it uses as much as digits as its factorization.

2261240909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 2261240909 is about 47552.5068634662. The cubic root of 2261240909 is about 1312.5492594543.

The spelling of 2261240909 in words is "two billion, two hundred sixty-one million, two hundred forty thousand, nine hundred nine".