25117513 has 2 divisors, whose sum is σ = 25117514. Its totient is φ = 25117512.

The previous prime is 25117507. The next prime is 25117537. The reversal of 25117513 is 31571152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16426809 + 8690704 = 4053^2 + 2948^2 .

It is a cyclic number.

It is not a de Polignac number, because 25117513 - 2¹³ = 25109321 is a prime.

It is not a weakly prime, because it can be changed into another prime (25117553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12558756 + 12558757.

It is an arithmetic number, because the mean of its divisors is an integer number (12558757).

Almost surely, 2^25117513 is an apocalyptic number.

It is an amenable number.

25117513 is a deficient number, since it is larger than the sum of its proper divisors (1).

25117513 is an equidigital number, since it uses as much as digits as its factorization.

25117513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1050, while the sum is 25.

The square root of 25117513 is about 5011.7375230553. The cubic root of 25117513 is about 292.8592046426.

Adding to 25117513 its reverse (31571152), we get a palindrome (56688665).

The spelling of 25117513 in words is "twenty-five million, one hundred seventeen thousand, five hundred thirteen".