312131132323 has 4 divisors (see below), whose sum is σ = 312133427008. Its totient is φ = 312128837640.

The previous prime is 312131132317. The next prime is 312131132393. The reversal of 312131132323 is 323231131213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323231131213 = 3989 ⋅81030617.

It is a cyclic number.

It is not a de Polignac number, because 312131132323 - 2¹³ = 312131124131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312131132393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 929523 + ... + 1219948.

It is an arithmetic number, because the mean of its divisors is an integer number (78033356752).

Almost surely, 2^312131132323 is an apocalyptic number.

312131132323 is a deficient number, since it is larger than the sum of its proper divisors (2294685).

312131132323 is a wasteful number, since it uses less digits than its factorization.

312131132323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294684.

The product of its digits is 1944, while the sum is 25.

Adding to 312131132323 its reverse (323231131213), we get a palindrome (635362263536).

The spelling of 312131132323 in words is "three hundred twelve billion, one hundred thirty-one million, one hundred thirty-two thousand, three hundred twenty-three".