25288381 has 2 divisors, whose sum is σ = 25288382. Its totient is φ = 25288380.

The previous prime is 25288369. The next prime is 25288391. The reversal of 25288381 is 18388252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23765625 + 1522756 = 4875^2 + 1234^2 .

It is a cyclic number.

It is not a de Polignac number, because 25288381 - 2⁹ = 25287869 is a prime.

It is a super-2 number, since 2×25288381² = 1279004427202322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25288381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25288301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12644190 + 12644191.

It is an arithmetic number, because the mean of its divisors is an integer number (12644191).

Almost surely, 2^25288381 is an apocalyptic number.

It is an amenable number.

25288381 is a deficient number, since it is larger than the sum of its proper divisors (1).

25288381 is an equidigital number, since it uses as much as digits as its factorization.

25288381 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 25288381 is about 5028.7554126245. The cubic root of 25288381 is about 293.5217864716.

The spelling of 25288381 in words is "twenty-five million, two hundred eighty-eight thousand, three hundred eighty-one".