384859221 has 4 divisors (see below), whose sum is σ = 513145632. Its totient is φ = 256572812.

The previous prime is 384859199. The next prime is 384859247. The reversal of 384859221 is 122958483.

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 384859221 - 2⁶ = 384859157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384859021) 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, 64143201 + ... + 64143206.

It is an arithmetic number, because the mean of its divisors is an integer number (128286408).

Almost surely, 2^384859221 is an apocalyptic number.

It is an amenable number.

384859221 is a deficient number, since it is larger than the sum of its proper divisors (128286411).

384859221 is a wasteful number, since it uses less digits than its factorization.

384859221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128286410.

The product of its digits is 138240, while the sum is 42.

The square root of 384859221 is about 19617.8291612502. The cubic root of 384859221 is about 727.3899541864.

The spelling of 384859221 in words is "three hundred eighty-four million, eight hundred fifty-nine thousand, two hundred twenty-one".