819242815 has 8 divisors (see below), whose sum is σ = 992825568. Its totient is φ = 648904800.

The previous prime is 819242813. The next prime is 819242839. The reversal of 819242815 is 518242918.

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

It is not a de Polignac number, because 819242815 - 2¹ = 819242813 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 (819242813) 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 7 ways as a sum of consecutive naturals, for example, 810627 + ... + 811636.

It is an arithmetic number, because the mean of its divisors is an integer number (124103196).

Almost surely, 2^819242815 is an apocalyptic number.

819242815 is a deficient number, since it is larger than the sum of its proper divisors (173582753).

819242815 is a wasteful number, since it uses less digits than its factorization.

819242815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622369.

The product of its digits is 46080, while the sum is 40.

The square root of 819242815 is about 28622.4180494940. The cubic root of 819242815 is about 935.7019769623.

The spelling of 819242815 in words is "eight hundred nineteen million, two hundred forty-two thousand, eight hundred fifteen".