28231253 has 2 divisors, whose sum is σ = 28231254. Its totient is φ = 28231252.

The previous prime is 28231249. The next prime is 28231261. The reversal of 28231253 is 35213282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17623204 + 10608049 = 4198^2 + 3257^2 .

It is a cyclic number.

It is not a de Polignac number, because 28231253 - 2² = 28231249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28231213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14115626 + 14115627.

It is an arithmetic number, because the mean of its divisors is an integer number (14115627).

Almost surely, 2^28231253 is an apocalyptic number.

It is an amenable number.

28231253 is a deficient number, since it is larger than the sum of its proper divisors (1).

28231253 is an equidigital number, since it uses as much as digits as its factorization.

28231253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 28231253 is about 5313.3090442774. The cubic root of 28231253 is about 304.4925827952.

The spelling of 28231253 in words is "twenty-eight million, two hundred thirty-one thousand, two hundred fifty-three".