82515641 has 8 divisors (see below), whose sum is σ = 89046720. Its totient is φ = 76010832.

The previous prime is 82515619. The next prime is 82515649. The reversal of 82515641 is 14651528.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82515641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82515598 and 82515607.

It is not an unprimeable number, because it can be changed into a prime (82515649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230 + ... + 12848.

It is an arithmetic number, because the mean of its divisors is an integer number (11130840).

Almost surely, 2^82515641 is an apocalyptic number.

It is an amenable number.

82515641 is a deficient number, since it is larger than the sum of its proper divisors (6531079).

82515641 is a wasteful number, since it uses less digits than its factorization.

82515641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13135.

The product of its digits is 9600, while the sum is 32.

The square root of 82515641 is about 9083.8120301997. The cubic root of 82515641 is about 435.3568938785.

The spelling of 82515641 in words is "eighty-two million, five hundred fifteen thousand, six hundred forty-one".