25382281 has 4 divisors (see below), whose sum is σ = 25644052. Its totient is φ = 25120512.

The previous prime is 25382263. The next prime is 25382293. The reversal of 25382281 is 18228352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18412681 + 6969600 = 4291^2 + 2640^2 .

It is a cyclic number.

It is not a de Polignac number, because 25382281 - 2⁵ = 25382249 is a prime.

It is a super-2 number, since 2×25382281² = 1288520377525922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25382261) 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 in 3 ways as a sum of consecutive naturals, for example, 130740 + ... + 130933.

It is an arithmetic number, because the mean of its divisors is an integer number (6411013).

Almost surely, 2^25382281 is an apocalyptic number.

It is an amenable number.

25382281 is a deficient number, since it is larger than the sum of its proper divisors (261771).

25382281 is an equidigital number, since it uses as much as digits as its factorization.

25382281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261770.

The product of its digits is 7680, while the sum is 31.

The square root of 25382281 is about 5038.0830679932. The cubic root of 25382281 is about 293.8846362749.

The spelling of 25382281 in words is "twenty-five million, three hundred eighty-two thousand, two hundred eighty-one".