25000000513 has 2 divisors, whose sum is σ = 25000000514. Its totient is φ = 25000000512.

The previous prime is 25000000511. The next prime is 25000000603. The reversal of 25000000513 is 31500000052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14671750129 + 10328250384 = 121127^2 + 101628^2 .

It is a cyclic number.

It is not a de Polignac number, because 25000000513 - 2¹ = 25000000511 is a prime.

Together with 25000000511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25000000511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12500000256 + 12500000257.

It is an arithmetic number, because the mean of its divisors is an integer number (12500000257).

Almost surely, 2^25000000513 is an apocalyptic number.

It is an amenable number.

25000000513 is a deficient number, since it is larger than the sum of its proper divisors (1).

25000000513 is an equidigital number, since it uses as much as digits as its factorization.

25000000513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 16.

Adding to 25000000513 its reverse (31500000052), we get a palindrome (56500000565).

The spelling of 25000000513 in words is "twenty-five billion, five hundred thirteen", and thus it is an aban number.