203221055673 has 12 divisors (see below), whose sum is σ = 299080044900. Its totient is φ = 132924463776.

The previous prime is 203221055641. The next prime is 203221055677. The reversal of 203221055673 is 376550122302.

203221055673 is a `hidden beast` number, since 2 + 0 + 3 + 22 + 10 + 556 + 73 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 83690439849 + 119530615824 = 289293^2 + 345732^2 .

It is not a de Polignac number, because 203221055673 - 2⁵ = 203221055641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203221055677) 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, 213019498 + ... + 213020451.

It is an arithmetic number, because the mean of its divisors is an integer number (24923337075).

Almost surely, 2^203221055673 is an apocalyptic number.

It is an amenable number.

203221055673 is a deficient number, since it is larger than the sum of its proper divisors (95858989227).

203221055673 is a wasteful number, since it uses less digits than its factorization.

203221055673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426040008 (or 426040005 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

Adding to 203221055673 its reverse (376550122302), we get a palindrome (579771177975).

The spelling of 203221055673 in words is "two hundred three billion, two hundred twenty-one million, fifty-five thousand, six hundred seventy-three".