30820223 has 16 divisors (see below), whose sum is σ = 38085120. Its totient is φ = 24346656.

The previous prime is 30820217. The next prime is 30820241. The reversal of 30820223 is 32202803.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 30820223 - 2⁶ = 30820159 is a prime.

It is a super-2 number, since 2×30820223² = 1899772291539458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30820195 and 30820204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30822223) 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 15 ways as a sum of consecutive naturals, for example, 1790 + ... + 8052.

It is an arithmetic number, because the mean of its divisors is an integer number (2380320).

Almost surely, 2^30820223 is an apocalyptic number.

30820223 is a deficient number, since it is larger than the sum of its proper divisors (7264897).

30820223 is a wasteful number, since it uses less digits than its factorization.

30820223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6326.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 30820223 is about 5551.5964370620. The cubic root of 30820223 is about 313.5296316618.

The spelling of 30820223 in words is "thirty million, eight hundred twenty thousand, two hundred twenty-three".