25513155 has 24 divisors (see below), whose sum is σ = 45651840. Its totient is φ = 13167360.

The previous prime is 25513109. The next prime is 25513199. The reversal of 25513155 is 55131552.

It is not a de Polignac number, because 25513155 - 2⁸ = 25512899 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 7750 + ... + 10539.

It is an arithmetic number, because the mean of its divisors is an integer number (1902160).

Almost surely, 2^25513155 is an apocalyptic number.

25513155 is a deficient number, since it is larger than the sum of its proper divisors (20138685).

25513155 is a wasteful number, since it uses less digits than its factorization.

25513155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18331 (or 18328 counting only the distinct ones).

The product of its digits is 3750, while the sum is 27.

The square root of 25513155 is about 5051.0548403279. The cubic root of 25513155 is about 294.3888717820.

The spelling of 25513155 in words is "twenty-five million, five hundred thirteen thousand, one hundred fifty-five".