385515555 has 16 divisors (see below), whose sum is σ = 625276320. Its totient is φ = 202791168.

The previous prime is 385515553. The next prime is 385515563. The reversal of 385515555 is 555515583.

It is not a de Polignac number, because 385515555 - 2¹ = 385515553 is a prime.

It is a super-4 number, since 4×385515555⁴ (a number of 35 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (385515551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174940 + ... + 177129.

It is an arithmetic number, because the mean of its divisors is an integer number (39079770).

Almost surely, 2^385515555 is an apocalyptic number.

385515555 is a deficient number, since it is larger than the sum of its proper divisors (239760765).

385515555 is a wasteful number, since it uses less digits than its factorization.

385515555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352150.

The product of its digits is 375000, while the sum is 42.

The square root of 385515555 is about 19634.5500330412. The cubic root of 385515555 is about 727.8032131990.

The spelling of 385515555 in words is "three hundred eighty-five million, five hundred fifteen thousand, five hundred fifty-five".