28251450203503 has 4 divisors (see below), whose sum is σ = 28252432174168. Its totient is φ = 28250468232840.

The previous prime is 28251450203443. The next prime is 28251450203519. The reversal of 28251450203503 is 30530205415282.

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 28251450203503 - 2¹⁷ = 28251450072431 is a prime.

It is a super-2 number, since 2×28251450203503² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28251450203803) 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, 490942176 + ... + 490999717.

It is an arithmetic number, because the mean of its divisors is an integer number (7063108043542).

Almost surely, 2^{28251450203503} is an apocalyptic number.

28251450203503 is a deficient number, since it is larger than the sum of its proper divisors (981970665).

28251450203503 is an equidigital number, since it uses as much as digits as its factorization.

28251450203503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981970664.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 28251450203503 its reverse (30530205415282), we get a palindrome (58781655618785).

The spelling of 28251450203503 in words is "twenty-eight trillion, two hundred fifty-one billion, four hundred fifty million, two hundred three thousand, five hundred three".