25821833 has 2 divisors, whose sum is σ = 25821834. Its totient is φ = 25821832.

The previous prime is 25821821. The next prime is 25821857. The reversal of 25821833 is 33812852.

25821833 is nontrivially palindromic in base 4.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14077504 + 11744329 = 3752^2 + 3427^2 .

It is a cyclic number.

It is not a de Polignac number, because 25821833 - 2⁸ = 25821577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25821833.

It is not a weakly prime, because it can be changed into another prime (25821883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12910916 + 12910917.

It is an arithmetic number, because the mean of its divisors is an integer number (12910917).

Almost surely, 2^25821833 is an apocalyptic number.

It is an amenable number.

25821833 is a deficient number, since it is larger than the sum of its proper divisors (1).

25821833 is an equidigital number, since it uses as much as digits as its factorization.

25821833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 25821833 is about 5081.5187690296. The cubic root of 25821833 is about 295.5713641636.

The spelling of 25821833 in words is "twenty-five million, eight hundred twenty-one thousand, eight hundred thirty-three".