25918229 has 4 divisors (see below), whose sum is σ = 26343180. Its totient is φ = 25493280.

The previous prime is 25918157. The next prime is 25918231. The reversal of 25918229 is 92281952.

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 6115729 + 19802500 = 2473^2 + 4450^2 .

It is a cyclic number.

It is not a de Polignac number, because 25918229 - 2¹⁶ = 25852693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25918192 and 25918201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25918259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212384 + ... + 212505.

It is an arithmetic number, because the mean of its divisors is an integer number (6585795).

Almost surely, 2^25918229 is an apocalyptic number.

It is an amenable number.

25918229 is a deficient number, since it is larger than the sum of its proper divisors (424951).

25918229 is an equidigital number, since it uses as much as digits as its factorization.

25918229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424950.

The product of its digits is 25920, while the sum is 38.

The square root of 25918229 is about 5090.9948929458. The cubic root of 25918229 is about 295.9387085476.

The spelling of 25918229 in words is "twenty-five million, nine hundred eighteen thousand, two hundred twenty-nine".