386531 has 4 divisors (see below), whose sum is σ = 391272. Its totient is φ = 381792.

The previous prime is 386521. The next prime is 386537. The reversal of 386531 is 135683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135683 = 241 ⋅563.

It is a cyclic number.

It is not a de Polignac number, because 386531 - 2¹⁴ = 370147 is a prime.

It is a super-2 number, since 2×386531² = 298812427922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 386531.

It is not an unprimeable number, because it can be changed into a prime (386537) 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, 2246 + ... + 2411.

It is an arithmetic number, because the mean of its divisors is an integer number (97818).

2³⁸⁶⁵³¹ is an apocalyptic number.

386531 is a deficient number, since it is larger than the sum of its proper divisors (4741).

386531 is an equidigital number, since it uses as much as digits as its factorization.

386531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4740.

The product of its digits is 2160, while the sum is 26.

The square root of 386531 is about 621.7161731852. The cubic root of 386531 is about 72.8441662321.

The spelling of 386531 in words is "three hundred eighty-six thousand, five hundred thirty-one".