2265521563 has 12 divisors (see below), whose sum is σ = 2400437160. Its totient is φ = 2137844736.

The previous prime is 2265521561. The next prime is 2265521579. The reversal of 2265521563 is 3651255622.

It is not a de Polignac number, because 2265521563 - 2¹ = 2265521561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2265521561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80568 + ... + 104986.

It is an arithmetic number, because the mean of its divisors is an integer number (200036430).

Almost surely, 2^2265521563 is an apocalyptic number.

2265521563 is a deficient number, since it is larger than the sum of its proper divisors (134915597).

2265521563 is a wasteful number, since it uses less digits than its factorization.

2265521563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24714 (or 24695 counting only the distinct ones).

The product of its digits is 108000, while the sum is 37.

The square root of 2265521563 is about 47597.4953437678. The cubic root of 2265521563 is about 1313.3769801273.

The spelling of 2265521563 in words is "two billion, two hundred sixty-five million, five hundred twenty-one thousand, five hundred sixty-three".