385511 has 4 divisors (see below), whose sum is σ = 440592. Its totient is φ = 330432.

The previous prime is 385501. The next prime is 385519. The reversal of 385511 is 115583.

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 385511 - 2¹⁰ = 384487 is a prime.

It is a super-2 number, since 2×385511² = 297237462242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385519) 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, 27530 + ... + 27543.

It is an arithmetic number, because the mean of its divisors is an integer number (110148).

2³⁸⁵⁵¹¹ is an apocalyptic number.

385511 is a deficient number, since it is larger than the sum of its proper divisors (55081).

385511 is an equidigital number, since it uses as much as digits as its factorization.

385511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55080.

The product of its digits is 600, while the sum is 23.

The square root of 385511 is about 620.8953212902. The cubic root of 385511 is about 72.7800346772.

The spelling of 385511 in words is "three hundred eighty-five thousand, five hundred eleven".