385331 has 2 divisors, whose sum is σ = 385332. Its totient is φ = 385330.

The previous prime is 385327. The next prime is 385351. The reversal of 385331 is 133583.

It is a weak prime.

It is an emirp because it is prime and its reverse (133583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385331 - 2² = 385327 is a prime.

It is a super-2 number, since 2×385331² = 296959959122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 385297 and 385306.

It is not a weakly prime, because it can be changed into another prime (385321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192665 + 192666.

It is an arithmetic number, because the mean of its divisors is an integer number (192666).

2³⁸⁵³³¹ is an apocalyptic number.

385331 is a deficient number, since it is larger than the sum of its proper divisors (1).

385331 is an equidigital number, since it uses as much as digits as its factorization.

385331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 385331 is about 620.7503523962. The cubic root of 385331 is about 72.7687056051.

The spelling of 385331 in words is "three hundred eighty-five thousand, three hundred thirty-one".