25615513 has 16 divisors (see below), whose sum is σ = 32348160. Its totient is φ = 19702800.

The previous prime is 25615501. The next prime is 25615523. The reversal of 25615513 is 31551652.

It is a cyclic number.

It is not a de Polignac number, because 25615513 - 2¹⁷ = 25484441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25615523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3978 + ... + 8188.

It is an arithmetic number, because the mean of its divisors is an integer number (2021760).

Almost surely, 2^25615513 is an apocalyptic number.

It is an amenable number.

25615513 is a deficient number, since it is larger than the sum of its proper divisors (6732647).

25615513 is a wasteful number, since it uses less digits than its factorization.

25615513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4308.

The product of its digits is 4500, while the sum is 28.

The square root of 25615513 is about 5061.1770370142. The cubic root of 25615513 is about 294.7820395168.

The spelling of 25615513 in words is "twenty-five million, six hundred fifteen thousand, five hundred thirteen".