25388281 has 2 divisors, whose sum is σ = 25388282. Its totient is φ = 25388280.

The previous prime is 25388263. The next prime is 25388291. The reversal of 25388281 is 18288352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22467600 + 2920681 = 4740^2 + 1709^2 .

It is a cyclic number.

It is not a de Polignac number, because 25388281 - 2⁵ = 25388249 is a prime.

It is a super-2 number, since 2×25388281² = 1289129624269922, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 25388281.

It is not a weakly prime, because it can be changed into another prime (25388201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12694140 + 12694141.

It is an arithmetic number, because the mean of its divisors is an integer number (12694141).

Almost surely, 2^25388281 is an apocalyptic number.

It is an amenable number.

25388281 is a deficient number, since it is larger than the sum of its proper divisors (1).

25388281 is an equidigital number, since it uses as much as digits as its factorization.

25388281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 37.

The square root of 25388281 is about 5038.6784973840. The cubic root of 25388281 is about 293.9077911272.

The spelling of 25388281 in words is "twenty-five million, three hundred eighty-eight thousand, two hundred eighty-one".