8251665215 has 8 divisors (see below), whose sum is σ = 10112679360. Its totient is φ = 6460878112.

The previous prime is 8251665197. The next prime is 8251665217. The reversal of 8251665215 is 5125661528.

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 8251665215 - 2¹⁸ = 8251403071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8251665217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17556500 + ... + 17556969.

It is an arithmetic number, because the mean of its divisors is an integer number (1264084920).

Almost surely, 2^8251665215 is an apocalyptic number.

8251665215 is a deficient number, since it is larger than the sum of its proper divisors (1861014145).

8251665215 is a wasteful number, since it uses less digits than its factorization.

8251665215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35113521.

The product of its digits is 144000, while the sum is 41.

The square root of 8251665215 is about 90838.6768672904. The cubic root of 8251665215 is about 2020.7559513369.

The spelling of 8251665215 in words is "eight billion, two hundred fifty-one million, six hundred sixty-five thousand, two hundred fifteen".