384168075221 has 4 divisors (see below), whose sum is σ = 439049228832. Its totient is φ = 329286921612.

The previous prime is 384168075217. The next prime is 384168075233. The reversal of 384168075221 is 122570861483.

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 384168075221 - 2² = 384168075217 is a prime.

It is a super-2 number, since 2×384168075221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384168075211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27440576795 + ... + 27440576808.

It is an arithmetic number, because the mean of its divisors is an integer number (109762307208).

Almost surely, 2^384168075221 is an apocalyptic number.

It is an amenable number.

384168075221 is a deficient number, since it is larger than the sum of its proper divisors (54881153611).

384168075221 is an equidigital number, since it uses as much as digits as its factorization.

384168075221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54881153610.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 384168075221 in words is "three hundred eighty-four billion, one hundred sixty-eight million, seventy-five thousand, two hundred twenty-one".