25616523 has 8 divisors (see below), whose sum is σ = 34715536. Its totient is φ = 16797600.

The previous prime is 25616497. The next prime is 25616531. The reversal of 25616523 is 32561652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25616523 - 2⁹ = 25616011 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25616533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69808 + ... + 70173.

It is an arithmetic number, because the mean of its divisors is an integer number (4339442).

Almost surely, 2^25616523 is an apocalyptic number.

25616523 is a deficient number, since it is larger than the sum of its proper divisors (9099013).

25616523 is a wasteful number, since it uses less digits than its factorization.

25616523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140045.

The product of its digits is 10800, while the sum is 30.

The square root of 25616523 is about 5061.2768151920. The cubic root of 25616523 is about 294.7859138091.

The spelling of 25616523 in words is "twenty-five million, six hundred sixteen thousand, five hundred twenty-three".