1563225565 has 24 divisors (see below), whose sum is σ = 2173884192. Its totient is φ = 1070004480.

The previous prime is 1563225563. The next prime is 1563225679. The reversal of 1563225565 is 5655223651.

It is a happy number.

It is not a de Polignac number, because 1563225565 - 2¹ = 1563225563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1563225563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33279 + ... + 65068.

It is an arithmetic number, because the mean of its divisors is an integer number (90578508).

Almost surely, 2^1563225565 is an apocalyptic number.

It is an amenable number.

1563225565 is a deficient number, since it is larger than the sum of its proper divisors (610658627).

1563225565 is a wasteful number, since it uses less digits than its factorization.

1563225565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98397 (or 98380 counting only the distinct ones).

The product of its digits is 270000, while the sum is 40.

The square root of 1563225565 is about 39537.6474388652. The cubic root of 1563225565 is about 1160.5767952431.

The spelling of 1563225565 in words is "one billion, five hundred sixty-three million, two hundred twenty-five thousand, five hundred sixty-five".