385121515 has 8 divisors (see below), whose sum is σ = 466236288. Its totient is φ = 305370240.

The previous prime is 385121489. The next prime is 385121549. The reversal of 385121515 is 515121583.

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

It is not a de Polignac number, because 385121515 - 2⁹ = 385121003 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 340251 + ... + 341380.

It is an arithmetic number, because the mean of its divisors is an integer number (58279536).

Almost surely, 2^385121515 is an apocalyptic number.

385121515 is a deficient number, since it is larger than the sum of its proper divisors (81114773).

385121515 is a wasteful number, since it uses less digits than its factorization.

385121515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681749.

The product of its digits is 6000, while the sum is 31.

The square root of 385121515 is about 19624.5131149794. The cubic root of 385121515 is about 727.5551632494. Note that the first 3 decimals are identical.

The spelling of 385121515 in words is "three hundred eighty-five million, one hundred twenty-one thousand, five hundred fifteen".