25553361 has 4 divisors (see below), whose sum is σ = 34071152. Its totient is φ = 17035572.

The previous prime is 25553357. The next prime is 25553371. The reversal of 25553361 is 16335552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25553361 - 2² = 25553357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25553371) 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 3 ways as a sum of consecutive naturals, for example, 4258891 + ... + 4258896.

It is an arithmetic number, because the mean of its divisors is an integer number (8517788).

Almost surely, 2^25553361 is an apocalyptic number.

It is an amenable number.

25553361 is a deficient number, since it is larger than the sum of its proper divisors (8517791).

25553361 is an equidigital number, since it uses as much as digits as its factorization.

25553361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8517790.

The product of its digits is 13500, while the sum is 30.

The square root of 25553361 is about 5055.0332343121. The cubic root of 25553361 is about 294.5434323984.

The spelling of 25553361 in words is "twenty-five million, five hundred fifty-three thousand, three hundred sixty-one".