38223209 has 4 divisors (see below), whose sum is σ = 38871120. Its totient is φ = 37575300.

The previous prime is 38223187. The next prime is 38223221. The reversal of 38223209 is 90232283.

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 a de Polignac number, because none of the positive numbers 2^k-38223209 is a prime.

It is a super-2 number, since 2×38223209² = 2922027412515362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38220209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323867 + ... + 323984.

It is an arithmetic number, because the mean of its divisors is an integer number (9717780).

Almost surely, 2^38223209 is an apocalyptic number.

It is an amenable number.

38223209 is a deficient number, since it is larger than the sum of its proper divisors (647911).

38223209 is an equidigital number, since it uses as much as digits as its factorization.

38223209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647910.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 38223209 is about 6182.4921350536. The cubic root of 38223209 is about 336.8545219394.

The spelling of 38223209 in words is "thirty-eight million, two hundred twenty-three thousand, two hundred nine".