25097155 has 4 divisors (see below), whose sum is σ = 30116592. Its totient is φ = 20077720.

The previous prime is 25097147. The next prime is 25097161. The reversal of 25097155 is 55179052.

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

It is not a de Polignac number, because 25097155 - 2³ = 25097147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25097155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2509711 + ... + 2509720.

It is an arithmetic number, because the mean of its divisors is an integer number (7529148).

Almost surely, 2^25097155 is an apocalyptic number.

25097155 is a deficient number, since it is larger than the sum of its proper divisors (5019437).

25097155 is an equidigital number, since it uses as much as digits as its factorization.

25097155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5019436.

The product of its (nonzero) digits is 15750, while the sum is 34.

The square root of 25097155 is about 5009.7060792027. The cubic root of 25097155 is about 292.7800614677.

It can be divided in two parts, 25097 and 155, that added together give a palindrome (25252).

The spelling of 25097155 in words is "twenty-five million, ninety-seven thousand, one hundred fifty-five".