312133231 has 8 divisors (see below), whose sum is σ = 315483984. Its totient is φ = 308790720.

The previous prime is 312133229. The next prime is 312133247. The reversal of 312133231 is 132331213.

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

It is a cyclic number.

It is not a de Polignac number, because 312133231 - 2¹ = 312133229 is a prime.

It is a super-2 number, since 2×312133231² = 194854307788998722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312133199 and 312133208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312133201) 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, 100441 + ... + 103501.

It is an arithmetic number, because the mean of its divisors is an integer number (39435498).

Almost surely, 2^312133231 is an apocalyptic number.

312133231 is a deficient number, since it is larger than the sum of its proper divisors (3350753).

312133231 is a wasteful number, since it uses less digits than its factorization.

312133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4121.

The product of its digits is 324, while the sum is 19.

The square root of 312133231 is about 17667.2926901662. The cubic root of 312133231 is about 678.3388164224.

Adding to 312133231 its reverse (132331213), we get a palindrome (444464444).

The spelling of 312133231 in words is "three hundred twelve million, one hundred thirty-three thousand, two hundred thirty-one".