25207513 has 2 divisors, whose sum is σ = 25207514. Its totient is φ = 25207512.

The previous prime is 25207493. The next prime is 25207519. The reversal of 25207513 is 31570252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25080064 + 127449 = 5008^2 + 357^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25207513 is a prime.

It is not a weakly prime, because it can be changed into another prime (25207519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12603756 + 12603757.

It is an arithmetic number, because the mean of its divisors is an integer number (12603757).

Almost surely, 2^25207513 is an apocalyptic number.

It is an amenable number.

25207513 is a deficient number, since it is larger than the sum of its proper divisors (1).

25207513 is an equidigital number, since it uses as much as digits as its factorization.

25207513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 25207513 is about 5020.7084161501. The cubic root of 25207513 is about 293.2085745572.

Adding to 25207513 its reverse (31570252), we get a palindrome (56777765).

The spelling of 25207513 in words is "twenty-five million, two hundred seven thousand, five hundred thirteen".