312231 has 8 divisors (see below), whose sum is σ = 419200.
Its totient is φ = 206712.
The previous prime is 312229. The next prime is 312233. The reversal of 312231 is 132213.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (312229) and next prime (312233).
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 312231 - 21 = 312229 is a prime.
It is a super-2 number, since 2×3122312 = 194976394722, 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 (312233) 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, 336 + ... + 858.
It is an arithmetic number, because the mean of its divisors is an integer number (52400).
2312231 is an apocalyptic number.
312231 is a deficient number, since it is larger than the sum of its proper divisors (106969).
312231 is a wasteful number, since it uses less digits than its factorization.
312231 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 725.
The product of its digits is 36, while the sum is 12.
The square root of 312231 is about 558.7763416610.
The cubic root of 312231 is about 67.8409634028.
Adding to 312231 its reverse (132213), we get a palindrome (444444).
The spelling of 312231 in words is "three hundred twelve thousand, two hundred thirty-one".