25555513 has 4 divisors (see below), whose sum is σ = 26900560. Its totient is φ = 24210468.

The previous prime is 25555499. The next prime is 25555529. The reversal of 25555513 is 31555552.

It is a happy number.

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 not a de Polignac number, because 25555513 - 2¹³ = 25547321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25555213) 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, 672495 + ... + 672532.

It is an arithmetic number, because the mean of its divisors is an integer number (6725140).

Almost surely, 2^25555513 is an apocalyptic number.

It is an amenable number.

25555513 is a deficient number, since it is larger than the sum of its proper divisors (1345047).

25555513 is a wasteful number, since it uses less digits than its factorization.

25555513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345046.

The product of its digits is 18750, while the sum is 31.

The square root of 25555513 is about 5055.2460869873. The cubic root of 25555513 is about 294.5517005824.

The spelling of 25555513 in words is "twenty-five million, five hundred fifty-five thousand, five hundred thirteen".