25630513 has 2 divisors, whose sum is σ = 25630514. Its totient is φ = 25630512.

The previous prime is 25630511. The next prime is 25630559. The reversal of 25630513 is 31503652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24532209 + 1098304 = 4953^2 + 1048^2 .

It is a cyclic number.

It is not a de Polignac number, because 25630513 - 2¹ = 25630511 is a prime.

Together with 25630511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25630511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12815256 + 12815257.

It is an arithmetic number, because the mean of its divisors is an integer number (12815257).

Almost surely, 2^25630513 is an apocalyptic number.

It is an amenable number.

25630513 is a deficient number, since it is larger than the sum of its proper divisors (1).

25630513 is an equidigital number, since it uses as much as digits as its factorization.

25630513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 25630513 is about 5062.6586888709. The cubic root of 25630513 is about 294.8395680384.

The spelling of 25630513 in words is "twenty-five million, six hundred thirty thousand, five hundred thirteen".