82745015 has 4 divisors (see below), whose sum is σ = 99294024. Its totient is φ = 66196008.

The previous prime is 82744999. The next prime is 82745017. The reversal of 82745015 is 51054728.

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

It is a cyclic number.

It is not a de Polignac number, because 82745015 - 2⁴ = 82744999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82745017) by changing a digit.

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, 8274497 + ... + 8274506.

It is an arithmetic number, because the mean of its divisors is an integer number (24823506).

Almost surely, 2^82745015 is an apocalyptic number.

82745015 is a deficient number, since it is larger than the sum of its proper divisors (16549009).

82745015 is a wasteful number, since it uses less digits than its factorization.

82745015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16549008.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 82745015 is about 9096.4286948230. The cubic root of 82745015 is about 435.7599171313.

The spelling of 82745015 in words is "eighty-two million, seven hundred forty-five thousand, fifteen".