25643313 has 12 divisors (see below), whose sum is σ = 37108240. Its totient is φ = 17064216.

The previous prime is 25643311. The next prime is 25643329. The reversal of 25643313 is 31334652.

It is a happy number.

25643313 is a `hidden beast` number, since 2 + 5 + 643 + 3 + 13 = 666.

It is not a de Polignac number, because 25643313 - 2¹ = 25643311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25643311) 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 11 ways as a sum of consecutive naturals, for example, 3270 + ... + 7872.

Almost surely, 2^25643313 is an apocalyptic number.

It is an amenable number.

25643313 is a deficient number, since it is larger than the sum of its proper divisors (11464927).

25643313 is a wasteful number, since it uses less digits than its factorization.

25643313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5228 (or 5225 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 25643313 is about 5063.9226889833. The cubic root of 25643313 is about 294.8886412974. Note that the first 3 decimals are identical.

Adding to 25643313 its reverse (31334652), we get a palindrome (56977965).

The spelling of 25643313 in words is "twenty-five million, six hundred forty-three thousand, three hundred thirteen".