15625013 has 2 divisors, whose sum is σ = 15625014. Its totient is φ = 15625012.

The previous prime is 15625007. The next prime is 15625019. The reversal of 15625013 is 31052651.

It is a balanced prime because it is at equal distance from previous prime (15625007) and next prime (15625019).

It can be written as a sum of positive squares in only one way, i.e., 14922769 + 702244 = 3863^2 + 838^2 .

It is a cyclic number.

It is not a de Polignac number, because 15625013 - 2⁶ = 15624949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15625013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15625019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7812506 + 7812507.

It is an arithmetic number, because the mean of its divisors is an integer number (7812507).

Almost surely, 2^15625013 is an apocalyptic number.

It is an amenable number.

15625013 is a deficient number, since it is larger than the sum of its proper divisors (1).

15625013 is an equidigital number, since it uses as much as digits as its factorization.

15625013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 15625013 is about 3952.8487195945. The cubic root of 15625013 is about 250.0000693333. Note that the first 4 decimals are identical.

Adding to 15625013 its reverse (31052651), we get a palindrome (46677664).

The spelling of 15625013 in words is "fifteen million, six hundred twenty-five thousand, thirteen".