385031 has 4 divisors (see below), whose sum is σ = 394464. Its totient is φ = 375600.

The previous prime is 385027. The next prime is 385039. The reversal of 385031 is 130583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130583 = 67 ⋅1949.

It is a cyclic number.

It is not a de Polignac number, because 385031 - 2² = 385027 is a prime.

It is a super-2 number, since 2×385031² = 296497741922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 384994 and 385012.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 385031.

It is not an unprimeable number, because it can be changed into a prime (385039) 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, 4655 + ... + 4736.

It is an arithmetic number, because the mean of its divisors is an integer number (98616).

2³⁸⁵⁰³¹ is an apocalyptic number.

385031 is the 278-th centered decagonal number.

385031 is a deficient number, since it is larger than the sum of its proper divisors (9433).

385031 is an equidigital number, since it uses as much as digits as its factorization.

385031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9432.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 385031 is about 620.5086623086. The cubic root of 385031 is about 72.7498159756.

The spelling of 385031 in words is "three hundred eighty-five thousand, thirty-one".