25515161 has 8 divisors (see below), whose sum is σ = 29871744. Its totient is φ = 21336480.

The previous prime is 25515121. The next prime is 25515167. The reversal of 25515161 is 16151552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25515161 - 2⁶ = 25515097 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25515161.

It is not an unprimeable number, because it can be changed into a prime (25515167) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 44165 + ... + 44738.

It is an arithmetic number, because the mean of its divisors is an integer number (3733968).

Almost surely, 2^25515161 is an apocalyptic number.

It is an amenable number.

25515161 is a deficient number, since it is larger than the sum of its proper divisors (4356583).

25515161 is an equidigital number, since it uses as much as digits as its factorization.

25515161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88951.

The product of its digits is 1500, while the sum is 26.

The square root of 25515161 is about 5051.2534088086. The cubic root of 25515161 is about 294.3965871299.

The spelling of 25515161 in words is "twenty-five million, five hundred fifteen thousand, one hundred sixty-one".