316381 has 4 divisors (see below), whose sum is σ = 340732. Its totient is φ = 292032.

The previous prime is 316373. The next prime is 316391. The reversal of 316381 is 183613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183613 = 31 ⋅5923.

It can be written as a sum of positive squares in 2 ways, for example, as 217156 + 99225 = 466^2 + 315^2 .

It is not a de Polignac number, because 316381 - 2³ = 316373 is a prime.

It is a super-2 number, since 2×316381² = 200193874322, 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 (316301) 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, 12156 + ... + 12181.

It is an arithmetic number, because the mean of its divisors is an integer number (85183).

2³¹⁶³⁸¹ is an apocalyptic number.

It is an amenable number.

316381 is a deficient number, since it is larger than the sum of its proper divisors (24351).

316381 is a wasteful number, since it uses less digits than its factorization.

316381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24350.

The product of its digits is 432, while the sum is 22.

The square root of 316381 is about 562.4775551078. The cubic root of 316381 is about 68.1402095491.

Adding to 316381 its reverse (183613), we get a palindrome (499994).

It can be divided in two parts, 3 and 16381, that added together give a 14-th power (16384 = 2¹⁴).

The spelling of 316381 in words is "three hundred sixteen thousand, three hundred eighty-one".