25728331 has 2 divisors, whose sum is σ = 25728332. Its totient is φ = 25728330.

The previous prime is 25728323. The next prime is 25728347. The reversal of 25728331 is 13382752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25728331 - 2³ = 25728323 is a prime.

It is a super-2 number, since 2×25728331² = 1323894032091122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25728293 and 25728302.

It is not a weakly prime, because it can be changed into another prime (25728301) 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, 12864165 + 12864166.

It is an arithmetic number, because the mean of its divisors is an integer number (12864166).

Almost surely, 2^25728331 is an apocalyptic number.

25728331 is a deficient number, since it is larger than the sum of its proper divisors (1).

25728331 is an equidigital number, since it uses as much as digits as its factorization.

25728331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 31.

The square root of 25728331 is about 5072.3102231626. The cubic root of 25728331 is about 295.2141736853.

The spelling of 25728331 in words is "twenty-five million, seven hundred twenty-eight thousand, three hundred thirty-one".