385815471 has 4 divisors (see below), whose sum is σ = 514420632. Its totient is φ = 257210312.

The previous prime is 385815467. The next prime is 385815497. The reversal of 385815471 is 174518583.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 385815471 - 2² = 385815467 is a prime.

It is a super-3 number, since 3×385815471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385811471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64302576 + ... + 64302581.

It is an arithmetic number, because the mean of its divisors is an integer number (128605158).

Almost surely, 2^385815471 is an apocalyptic number.

385815471 is a deficient number, since it is larger than the sum of its proper divisors (128605161).

385815471 is a wasteful number, since it uses less digits than its factorization.

385815471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128605160.

The product of its digits is 134400, while the sum is 42.

The square root of 385815471 is about 19642.1860035995. The cubic root of 385815471 is about 727.9918984074.

The spelling of 385815471 in words is "three hundred eighty-five million, eight hundred fifteen thousand, four hundred seventy-one".