28213194241 has 4 divisors (see below), whose sum is σ = 28675705684. Its totient is φ = 27750682800.

The previous prime is 28213194227. The next prime is 28213194307. The reversal of 28213194241 is 14249131282.

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 12805185600 + 15408008641 = 113160^2 + 124129^2 .

It is a cyclic number.

It is not a de Polignac number, because 28213194241 - 2¹⁷ = 28213063169 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 28213194241.

It is not an unprimeable number, because it can be changed into a prime (28213194341) 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, 231255630 + ... + 231255751.

It is an arithmetic number, because the mean of its divisors is an integer number (7168926421).

Almost surely, 2^28213194241 is an apocalyptic number.

It is an amenable number.

28213194241 is a deficient number, since it is larger than the sum of its proper divisors (462511443).

28213194241 is an equidigital number, since it uses as much as digits as its factorization.

28213194241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462511442.

The product of its digits is 27648, while the sum is 37.

The spelling of 28213194241 in words is "twenty-eight billion, two hundred thirteen million, one hundred ninety-four thousand, two hundred forty-one".