28213544203 has 4 divisors (see below), whose sum is σ = 30383816848. Its totient is φ = 26043271560.

The previous prime is 28213544197. The next prime is 28213544213. The reversal of 28213544203 is 30244531282.

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 28213544203 - 2⁹ = 28213543691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28213544213) 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, 1085136303 + ... + 1085136328.

It is an arithmetic number, because the mean of its divisors is an integer number (7595954212).

Almost surely, 2^28213544203 is an apocalyptic number.

28213544203 is a deficient number, since it is larger than the sum of its proper divisors (2170272645).

28213544203 is a wasteful number, since it uses less digits than its factorization.

28213544203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170272644.

The product of its (nonzero) digits is 46080, while the sum is 34.

The spelling of 28213544203 in words is "twenty-eight billion, two hundred thirteen million, five hundred forty-four thousand, two hundred three".