385181 has 4 divisors (see below), whose sum is σ = 401952. Its totient is φ = 368412.

The previous prime is 385171. The next prime is 385193. The reversal of 385181 is 181583.

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 385181 - 2¹⁰ = 384157 is a prime.

It is a super-2 number, since 2×385181² = 296728805522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 385181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385141) 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, 8351 + ... + 8396.

It is an arithmetic number, because the mean of its divisors is an integer number (100488).

2³⁸⁵¹⁸¹ is an apocalyptic number.

It is an amenable number.

385181 is a deficient number, since it is larger than the sum of its proper divisors (16771).

385181 is a wasteful number, since it uses less digits than its factorization.

385181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16770.

The product of its digits is 960, while the sum is 26.

The square root of 385181 is about 620.6295191175. The cubic root of 385181 is about 72.7592620164.

It can be divided in two parts, 38 and 5181, that multiplied together give a triangular number (196878 = T₆₂₇).

The spelling of 385181 in words is "three hundred eighty-five thousand, one hundred eighty-one".