28281516253 has 2 divisors, whose sum is σ = 28281516254. Its totient is φ = 28281516252.

The previous prime is 28281516203. The next prime is 28281516293. The reversal of 28281516253 is 35261518282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16032117924 + 12249398329 = 126618^2 + 110677^2 .

It is a cyclic number.

It is not a de Polignac number, because 28281516253 - 2¹³ = 28281508061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28281516203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14140758126 + 14140758127.

It is an arithmetic number, because the mean of its divisors is an integer number (14140758127).

Almost surely, 2^28281516253 is an apocalyptic number.

It is an amenable number.

28281516253 is a deficient number, since it is larger than the sum of its proper divisors (1).

28281516253 is an equidigital number, since it uses as much as digits as its factorization.

28281516253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 43.

The spelling of 28281516253 in words is "twenty-eight billion, two hundred eighty-one million, five hundred sixteen thousand, two hundred fifty-three".