385518057 has 4 divisors (see below), whose sum is σ = 514024080. Its totient is φ = 257012036.

The previous prime is 385518011. The next prime is 385518071. The reversal of 385518057 is 750815583.

It is a happy number.

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 385518057 - 2⁸ = 385517801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (385518457) 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 3 ways as a sum of consecutive naturals, for example, 64253007 + ... + 64253012.

It is an arithmetic number, because the mean of its divisors is an integer number (128506020).

Almost surely, 2^385518057 is an apocalyptic number.

It is an amenable number.

385518057 is a deficient number, since it is larger than the sum of its proper divisors (128506023).

385518057 is a wasteful number, since it uses less digits than its factorization.

385518057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128506022.

The product of its (nonzero) digits is 168000, while the sum is 42.

The square root of 385518057 is about 19634.6137471558. The cubic root of 385518057 is about 727.8047876791.

It can be divided in two parts, 3855 and 18057, that added together give a palindrome (21912).

The spelling of 385518057 in words is "three hundred eighty-five million, five hundred eighteen thousand, fifty-seven".