25633313 has 2 divisors, whose sum is σ = 25633314. Its totient is φ = 25633312.

The previous prime is 25633273. The next prime is 25633319. The reversal of 25633313 is 31333652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17205904 + 8427409 = 4148^2 + 2903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25633313 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25633319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12816656 + 12816657.

It is an arithmetic number, because the mean of its divisors is an integer number (12816657).

Almost surely, 2^25633313 is an apocalyptic number.

It is an amenable number.

25633313 is a deficient number, since it is larger than the sum of its proper divisors (1).

25633313 is an equidigital number, since it uses as much as digits as its factorization.

25633313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 26.

The square root of 25633313 is about 5062.9352158605. The cubic root of 25633313 is about 294.8503042097.

Adding to 25633313 its reverse (31333652), we get a palindrome (56966965).

The spelling of 25633313 in words is "twenty-five million, six hundred thirty-three thousand, three hundred thirteen".