28000525253 has 4 divisors (see below), whose sum is σ = 28001236908. Its totient is φ = 27999813600.

The previous prime is 28000525249. The next prime is 28000525271. The reversal of 28000525253 is 35252500082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13948082404 + 14052442849 = 118102^2 + 118543^2 .

It is a cyclic number.

It is not a de Polignac number, because 28000525253 - 2² = 28000525249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000525753) 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, 293126 + ... + 376727.

It is an arithmetic number, because the mean of its divisors is an integer number (7000309227).

Almost surely, 2^28000525253 is an apocalyptic number.

It is an amenable number.

28000525253 is a deficient number, since it is larger than the sum of its proper divisors (711655).

28000525253 is an equidigital number, since it uses as much as digits as its factorization.

28000525253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711654.

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 28000525253 in words is "twenty-eight billion, five hundred twenty-five thousand, two hundred fifty-three".