25502155 has 16 divisors (see below), whose sum is σ = 35112384. Its totient is φ = 17418240.

The previous prime is 25502131. The next prime is 25502167. The reversal of 25502155 is 55120552.

It is a happy number.

It is not a de Polignac number, because 25502155 - 2⁷ = 25502027 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 8539 + ... + 11131.

It is an arithmetic number, because the mean of its divisors is an integer number (2194524).

Almost surely, 2^25502155 is an apocalyptic number.

25502155 is a deficient number, since it is larger than the sum of its proper divisors (9610229).

25502155 is a wasteful number, since it uses less digits than its factorization.

25502155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2886.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 25502155 is about 5049.9658414686. The cubic root of 25502155 is about 294.3465571003.

The spelling of 25502155 in words is "twenty-five million, five hundred two thousand, one hundred fifty-five".