25526513 has 2 divisors, whose sum is σ = 25526514. Its totient is φ = 25526512.

The previous prime is 25526509. The next prime is 25526521. The reversal of 25526513 is 31562552.

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., 21270544 + 4255969 = 4612^2 + 2063^2 .

It is a cyclic number.

It is not a de Polignac number, because 25526513 - 2² = 25526509 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 (25526213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12763256 + 12763257.

It is an arithmetic number, because the mean of its divisors is an integer number (12763257).

Almost surely, 2^25526513 is an apocalyptic number.

It is an amenable number.

25526513 is a deficient number, since it is larger than the sum of its proper divisors (1).

25526513 is an equidigital number, since it uses as much as digits as its factorization.

25526513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 29.

The square root of 25526513 is about 5052.3769653501. The cubic root of 25526513 is about 294.4402408429.

The spelling of 25526513 in words is "twenty-five million, five hundred twenty-six thousand, five hundred thirteen".