312130231 has 4 divisors (see below), whose sum is σ = 356720272. Its totient is φ = 267540192.

The previous prime is 312130223. The next prime is 312130283. The reversal of 312130231 is 132031213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132031213 = 617 ⋅213989.

It is a cyclic number.

It is not a de Polignac number, because 312130231 - 2³ = 312130223 is a prime.

It is a super-2 number, since 2×312130231² = 194850562208226722, 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 (312130211) 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, 22295010 + ... + 22295023.

It is an arithmetic number, because the mean of its divisors is an integer number (89180068).

Almost surely, 2^312130231 is an apocalyptic number.

312130231 is a deficient number, since it is larger than the sum of its proper divisors (44590041).

312130231 is an equidigital number, since it uses as much as digits as its factorization.

312130231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44590040.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 312130231 is about 17667.2077873104. The cubic root of 312130231 is about 678.3366431805.

Adding to 312130231 its reverse (132031213), we get a palindrome (444161444).

The spelling of 312130231 in words is "three hundred twelve million, one hundred thirty thousand, two hundred thirty-one".