820081223 has 8 divisors (see below), whose sum is σ = 911654016. Its totient is φ = 732578400.

The previous prime is 820081217. The next prime is 820081237. The reversal of 820081223 is 322180028.

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 820081223 - 2⁸ = 820080967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 820081192 and 820081201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820081523) 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, 1017068 + ... + 1017873.

It is an arithmetic number, because the mean of its divisors is an integer number (113956752).

Almost surely, 2^820081223 is an apocalyptic number.

820081223 is a deficient number, since it is larger than the sum of its proper divisors (91572793).

820081223 is a wasteful number, since it uses less digits than its factorization.

820081223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034985.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 820081223 is about 28637.0603065329. The cubic root of 820081223 is about 936.0210653300.

The spelling of 820081223 in words is "eight hundred twenty million, eighty-one thousand, two hundred twenty-three".