312042231 has 12 divisors (see below), whose sum is σ = 457076880. Its totient is φ = 205097760.

The previous prime is 312042229. The next prime is 312042251. The reversal of 312042231 is 132240213.

It is not a de Polignac number, because 312042231 - 2¹ = 312042229 is a prime.

It is a super-2 number, since 2×312042231² = 194740707854914722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312042251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243526 + ... + 244803.

It is an arithmetic number, because the mean of its divisors is an integer number (38089740).

Almost surely, 2^312042231 is an apocalyptic number.

312042231 is a deficient number, since it is larger than the sum of its proper divisors (145034649).

312042231 is a wasteful number, since it uses less digits than its factorization.

312042231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488406 (or 488403 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 312042231 is about 17664.7171219921. The cubic root of 312042231 is about 678.2728885578.

Adding to 312042231 its reverse (132240213), we get a palindrome (444282444).

The spelling of 312042231 in words is "three hundred twelve million, forty-two thousand, two hundred thirty-one".