312240231 has 16 divisors (see below), whose sum is σ = 466905600. Its totient is φ = 206212824.

The previous prime is 312240221. The next prime is 312240233. The reversal of 312240231 is 132042213.

It is not a de Polignac number, because 312240231 - 2¹¹ = 312238183 is a prime.

It is a super-2 number, since 2×312240231² = 194987923709866722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312240233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51151 + ... + 56928.

It is an arithmetic number, because the mean of its divisors is an integer number (29181600).

Almost surely, 2^312240231 is an apocalyptic number.

312240231 is a deficient number, since it is larger than the sum of its proper divisors (154665369).

312240231 is a wasteful number, since it uses less digits than its factorization.

312240231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108195 (or 108189 counting only the distinct ones).

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

The square root of 312240231 is about 17670.3206252745. The cubic root of 312240231 is about 678.4163196100.

Adding to 312240231 its reverse (132042213), we get a palindrome (444282444).

The spelling of 312240231 in words is "three hundred twelve million, two hundred forty thousand, two hundred thirty-one".