25415155 has 4 divisors (see below), whose sum is σ = 30498192. Its totient is φ = 20332120.

The previous prime is 25415149. The next prime is 25415171. The reversal of 25415155 is 55151452.

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

It is not a de Polignac number, because 25415155 - 2¹³ = 25406963 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2541511 + ... + 2541520.

It is an arithmetic number, because the mean of its divisors is an integer number (7624548).

Almost surely, 2^25415155 is an apocalyptic number.

25415155 is a deficient number, since it is larger than the sum of its proper divisors (5083037).

25415155 is an equidigital number, since it uses as much as digits as its factorization.

25415155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5083036.

The product of its digits is 5000, while the sum is 28.

The square root of 25415155 is about 5041.3445627134. The cubic root of 25415155 is about 294.0114569710.

The spelling of 25415155 in words is "twenty-five million, four hundred fifteen thousand, one hundred fifty-five".