30686223 has 4 divisors (see below), whose sum is σ = 40914968. Its totient is φ = 20457480.

The previous prime is 30686203. The next prime is 30686237. The reversal of 30686223 is 32268603.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 30686223 - 2¹⁰ = 30685199 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 (30686203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5114368 + ... + 5114373.

It is an arithmetic number, because the mean of its divisors is an integer number (10228742).

Almost surely, 2^30686223 is an apocalyptic number.

30686223 is a deficient number, since it is larger than the sum of its proper divisors (10228745).

30686223 is a wasteful number, since it uses less digits than its factorization.

30686223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10228744.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 30686223 is about 5539.5146899345. The cubic root of 30686223 is about 313.0745840560.

The spelling of 30686223 in words is "thirty million, six hundred eighty-six thousand, two hundred twenty-three".