817228013 has 4 divisors (see below), whose sum is σ = 933974880. Its totient is φ = 700481148.

The previous prime is 817228003. The next prime is 817228021. The reversal of 817228013 is 310822718.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 817228013 - 2⁴ = 817227997 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 (817228003) 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, 58373423 + ... + 58373436.

It is an arithmetic number, because the mean of its divisors is an integer number (233493720).

Almost surely, 2^817228013 is an apocalyptic number.

It is an amenable number.

817228013 is a deficient number, since it is larger than the sum of its proper divisors (116746867).

817228013 is a wasteful number, since it uses less digits than its factorization.

817228013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116746866.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 817228013 is about 28587.2001602116. The cubic root of 817228013 is about 934.9342754567.

The spelling of 817228013 in words is "eight hundred seventeen million, two hundred twenty-eight thousand, thirteen".