2261289559 has 4 divisors (see below), whose sum is σ = 2261601216. Its totient is φ = 2260977904.

The previous prime is 2261289539. The next prime is 2261289623. The reversal of 2261289559 is 9559821622.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2261289559 is a prime.

It is a super-2 number, since 2×2261289559² = 10226860939284828962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261289539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144679 + ... + 159544.

It is an arithmetic number, because the mean of its divisors is an integer number (565400304).

Almost surely, 2^2261289559 is an apocalyptic number.

2261289559 is a deficient number, since it is larger than the sum of its proper divisors (311657).

2261289559 is an equidigital number, since it uses as much as digits as its factorization.

2261289559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311656.

The product of its digits is 777600, while the sum is 49.

The square root of 2261289559 is about 47553.0184005180. The cubic root of 2261289559 is about 1312.5586724369.

The spelling of 2261289559 in words is "two billion, two hundred sixty-one million, two hundred eighty-nine thousand, five hundred fifty-nine".