25550887 has 4 divisors (see below), whose sum is σ = 25969816. Its totient is φ = 25131960.

The previous prime is 25550857. The next prime is 25550923. The reversal of 25550887 is 78805552.

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

It is a cyclic number.

It is not a de Polignac number, because 25550887 - 2¹¹ = 25548839 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 (25550807) 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 3 ways as a sum of consecutive naturals, for example, 209373 + ... + 209494.

It is an arithmetic number, because the mean of its divisors is an integer number (6492454).

Almost surely, 2^25550887 is an apocalyptic number.

25550887 is a deficient number, since it is larger than the sum of its proper divisors (418929).

25550887 is an equidigital number, since it uses as much as digits as its factorization.

25550887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418928.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 25550887 is about 5054.7885217880. The cubic root of 25550887 is about 294.5339264868.

The spelling of 25550887 in words is "twenty-five million, five hundred fifty thousand, eight hundred eighty-seven".