820413215 has 8 divisors (see below), whose sum is σ = 984765600. Its totient is φ = 656150752.

The previous prime is 820413163. The next prime is 820413227. The reversal of 820413215 is 512314028.

820413215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 820413215 - 2¹² = 820409119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440 + ... + 40509.

It is an arithmetic number, because the mean of its divisors is an integer number (123095700).

Almost surely, 2^820413215 is an apocalyptic number.

820413215 is a deficient number, since it is larger than the sum of its proper divisors (164352385).

820413215 is a wasteful number, since it uses less digits than its factorization.

820413215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44961.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 820413215 is about 28642.8562646954. The cubic root of 820413215 is about 936.1473575283.

The spelling of 820413215 in words is "eight hundred twenty million, four hundred thirteen thousand, two hundred fifteen".