312212231 has 4 divisors (see below), whose sum is σ = 322978200. Its totient is φ = 301446264.

The previous prime is 312212221. The next prime is 312212233. The reversal of 312212231 is 132212213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312212231 - 2¹⁴ = 312195847 is a prime.

It is a super-2 number, since 2×312212231² = 194952954371994722, 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 (312212233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5382941 + ... + 5382998.

It is an arithmetic number, because the mean of its divisors is an integer number (80744550).

Almost surely, 2^312212231 is an apocalyptic number.

312212231 is a deficient number, since it is larger than the sum of its proper divisors (10765969).

312212231 is a wasteful number, since it uses less digits than its factorization.

312212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10765968.

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

The square root of 312212231 is about 17669.5283185489. The cubic root of 312212231 is about 678.3960401127.

Adding to 312212231 its reverse (132212213), we get a palindrome (444424444).

The spelling of 312212231 in words is "three hundred twelve million, two hundred twelve thousand, two hundred thirty-one".