25728211 has 2 divisors, whose sum is σ = 25728212. Its totient is φ = 25728210.

The previous prime is 25728181. The next prime is 25728221. The reversal of 25728211 is 11282752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25728211 - 2¹⁵ = 25695443 is a prime.

It is equal to p_1608553 and since 25728211 and 1608553 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25728211.

It is not a weakly prime, because it can be changed into another prime (25728221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12864105 + 12864106.

It is an arithmetic number, because the mean of its divisors is an integer number (12864106).

Almost surely, 2^25728211 is an apocalyptic number.

25728211 is a deficient number, since it is larger than the sum of its proper divisors (1).

25728211 is an equidigital number, since it uses as much as digits as its factorization.

25728211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 28.

The square root of 25728211 is about 5072.2983942193. The cubic root of 25728211 is about 295.2137147133.

The spelling of 25728211 in words is "twenty-five million, seven hundred twenty-eight thousand, two hundred eleven".