308231 has 8 divisors (see below), whose sum is σ = 384384. Its totient is φ = 240120.

The previous prime is 308219. The next prime is 308249. The reversal of 308231 is 132803.

308231 = 111² + 112² + ... + 131².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-308231 is a prime.

It is a super-2 number, since 2×308231² = 190012698722, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3 + 0 + 2¹⁷ + 8 + 3¹¹ + 1 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1925 + ... + 2078.

It is an arithmetic number, because the mean of its divisors is an integer number (48048).

2³⁰⁸²³¹ is an apocalyptic number.

308231 is a deficient number, since it is larger than the sum of its proper divisors (76153).

308231 is a wasteful number, since it uses less digits than its factorization.

308231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 308231 is about 555.1855545671. The cubic root of 308231 is about 67.5500132314.

It can be divided in two parts, 3082 and 31, that added together give a palindrome (3113).

The spelling of 308231 in words is "three hundred eight thousand, two hundred thirty-one".