384274231521 has 8 divisors (see below), whose sum is σ = 512434197504. Its totient is φ = 256148543280.

The previous prime is 384274231519. The next prime is 384274231531. The reversal of 384274231521 is 125132472483.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 384274231521 - 2¹ = 384274231519 is a prime.

It is a super-2 number, since 2×384274231521² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (384274231531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8543265 + ... + 8588126.

It is an arithmetic number, because the mean of its divisors is an integer number (64054274688).

Almost surely, 2^384274231521 is an apocalyptic number.

It is an amenable number.

384274231521 is a deficient number, since it is larger than the sum of its proper divisors (128159965983).

384274231521 is a wasteful number, since it uses less digits than its factorization.

384274231521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17138871.

The product of its digits is 322560, while the sum is 42.

The spelling of 384274231521 in words is "three hundred eighty-four billion, two hundred seventy-four million, two hundred thirty-one thousand, five hundred twenty-one".