25551625 has 16 divisors (see below), whose sum is σ = 34789248. Its totient is φ = 18582000.

The previous prime is 25551623. The next prime is 25551649. The reversal of 25551625 is 52615552.

It is not a de Polignac number, because 25551625 - 2¹ = 25551623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25551623) 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 15 ways as a sum of consecutive naturals, for example, 7917 + ... + 10666.

It is an arithmetic number, because the mean of its divisors is an integer number (2174328).

Almost surely, 2^25551625 is an apocalyptic number.

25551625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25551625 is a deficient number, since it is larger than the sum of its proper divisors (9237623).

25551625 is a wasteful number, since it uses less digits than its factorization.

25551625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18609 (or 18599 counting only the distinct ones).

The product of its digits is 15000, while the sum is 31.

The square root of 25551625 is about 5054.8615213475. The cubic root of 25551625 is about 294.5367621867.

The spelling of 25551625 in words is "twenty-five million, five hundred fifty-one thousand, six hundred twenty-five".