384521157 has 12 divisors (see below), whose sum is σ = 556294284. Its totient is φ = 255943680.

The previous prime is 384521143. The next prime is 384521167. The reversal of 384521157 is 751125483.

384521157 is a `hidden beast` number, since 3 + 84 + 521 + 1 + 57 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 141348321 + 243172836 = 11889^2 + 15594^2 .

It is not a de Polignac number, because 384521157 - 2⁴ = 384521141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384521167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27558 + ... + 39095.

It is an arithmetic number, because the mean of its divisors is an integer number (46357857).

Almost surely, 2^384521157 is an apocalyptic number.

It is an amenable number.

384521157 is a deficient number, since it is larger than the sum of its proper divisors (171773127).

384521157 is a wasteful number, since it uses less digits than its factorization.

384521157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67300 (or 67297 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 384521157 is about 19609.2110244140. The cubic root of 384521157 is about 727.1769097095.

The spelling of 384521157 in words is "three hundred eighty-four million, five hundred twenty-one thousand, one hundred fifty-seven".