25855513 has 4 divisors (see below), whose sum is σ = 26456848. Its totient is φ = 25254180.

The previous prime is 25855507. The next prime is 25855537. The reversal of 25855513 is 31555852.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25855513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25855913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300603 + ... + 300688.

It is an arithmetic number, because the mean of its divisors is an integer number (6614212).

Almost surely, 2^25855513 is an apocalyptic number.

It is an amenable number.

25855513 is a deficient number, since it is larger than the sum of its proper divisors (601335).

25855513 is an equidigital number, since it uses as much as digits as its factorization.

25855513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601334.

The product of its digits is 30000, while the sum is 34.

The square root of 25855513 is about 5084.8316589637. The cubic root of 25855513 is about 295.6998151347.

The spelling of 25855513 in words is "twenty-five million, eight hundred fifty-five thousand, five hundred thirteen".