25016623 has 4 divisors (see below), whose sum is σ = 25182448. Its totient is φ = 24850800.

The previous prime is 25016603. The next prime is 25016671. The reversal of 25016623 is 32661052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25016623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25016603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82686 + ... + 82987.

It is an arithmetic number, because the mean of its divisors is an integer number (6295612).

Almost surely, 2^25016623 is an apocalyptic number.

25016623 is a deficient number, since it is larger than the sum of its proper divisors (165825).

25016623 is a wasteful number, since it uses less digits than its factorization.

25016623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165824.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 25016623 is about 5001.6620237677. The cubic root of 25016623 is about 292.4665673917.

Adding to 25016623 its reverse (32661052), we get a palindrome (57677675).

The spelling of 25016623 in words is "twenty-five million, sixteen thousand, six hundred twenty-three".