2265288691 has 4 divisors (see below), whose sum is σ = 2266300872. Its totient is φ = 2264276512.

The previous prime is 2265288659. The next prime is 2265288731. The reversal of 2265288691 is 1968825622.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2265288691 - 2⁵ = 2265288659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2265288611) 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 in 3 ways as a sum of consecutive naturals, for example, 502726 + ... + 507211.

It is an arithmetic number, because the mean of its divisors is an integer number (566575218).

Almost surely, 2^2265288691 is an apocalyptic number.

2265288691 is a deficient number, since it is larger than the sum of its proper divisors (1012181).

2265288691 is a wasteful number, since it uses less digits than its factorization.

2265288691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012180.

The product of its digits is 829440, while the sum is 49.

The square root of 2265288691 is about 47595.0490177287. The cubic root of 2265288691 is about 1313.3319780979.

The spelling of 2265288691 in words is "two billion, two hundred sixty-five million, two hundred eighty-eight thousand, six hundred ninety-one".