25651013 has 2 divisors, whose sum is σ = 25651014. Its totient is φ = 25651012.

The previous prime is 25651009. The next prime is 25651037. The reversal of 25651013 is 31015652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14615329 + 11035684 = 3823^2 + 3322^2 .

It is a cyclic number.

It is not a de Polignac number, because 25651013 - 2² = 25651009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25651013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25651513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12825506 + 12825507.

It is an arithmetic number, because the mean of its divisors is an integer number (12825507).

Almost surely, 2^25651013 is an apocalyptic number.

It is an amenable number.

25651013 is a deficient number, since it is larger than the sum of its proper divisors (1).

25651013 is an equidigital number, since it uses as much as digits as its factorization.

25651013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 25651013 is about 5064.6829120884. The cubic root of 25651013 is about 294.9181540636.

Adding to 25651013 its reverse (31015652), we get a palindrome (56666665).

The spelling of 25651013 in words is "twenty-five million, six hundred fifty-one thousand, thirteen".