25822891 has 4 divisors (see below), whose sum is σ = 25833672. Its totient is φ = 25812112.

The previous prime is 25822871. The next prime is 25822897. The reversal of 25822891 is 19822852.

25822891 is a nontrivial binomial coefficient, being equal to C(7187, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 25822891 - 2⁷ = 25822763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25822891.

It is not an unprimeable number, because it can be changed into a prime (25822897) 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, 1 + ... + 7186.

It is an arithmetic number, because the mean of its divisors is an integer number (6458418).

Almost surely, 2^25822891 is an apocalyptic number.

25822891 is the 7186-th triangular number.

25822891 is the 2396-th centered nonagonal number.

25822891 is a deficient number, since it is larger than the sum of its proper divisors (10781).

25822891 is an equidigital number, since it uses as much as digits as its factorization.

25822891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10780.

The product of its digits is 23040, while the sum is 37.

The square root of 25822891 is about 5081.6228706979. The cubic root of 25822891 is about 295.5754009314.

The spelling of 25822891 in words is "twenty-five million, eight hundred twenty-two thousand, eight hundred ninety-one".