203454225563 has 4 divisors (see below), whose sum is σ = 203635396968. Its totient is φ = 203273054160.

The previous prime is 203454225551. The next prime is 203454225577. The reversal of 203454225563 is 365522454302.

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 203454225563 - 2²⁰ = 203453176987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203454225563.

It is not an unprimeable number, because it can be changed into a prime (203454215563) 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, 90584018 + ... + 90586263.

It is an arithmetic number, because the mean of its divisors is an integer number (50908849242).

Almost surely, 2^203454225563 is an apocalyptic number.

203454225563 is a deficient number, since it is larger than the sum of its proper divisors (181171405).

203454225563 is a wasteful number, since it uses less digits than its factorization.

203454225563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181171404.

The product of its (nonzero) digits is 864000, while the sum is 41.

Adding to 203454225563 its reverse (365522454302), we get a palindrome (568976679865).

The spelling of 203454225563 in words is "two hundred three billion, four hundred fifty-four million, two hundred twenty-five thousand, five hundred sixty-three".