312131330204231 has 2 divisors, whose sum is σ = 312131330204232. Its totient is φ = 312131330204230.

The previous prime is 312131330204189. The next prime is 312131330204263. The reversal of 312131330204231 is 132402033131213.

It is a strong prime.

It is an emirp because it is prime and its reverse (132402033131213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312131330204231 - 2⁶ = 312131330204167 is a prime.

It is a super-5 number, since 5×312131330204231⁵ (a number of 74 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 312131330204194 and 312131330204203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312131330204831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156065665102115 + 156065665102116.

It is an arithmetic number, because the mean of its divisors is an integer number (156065665102116).

Almost surely, 2^{312131330204231} is an apocalyptic number.

312131330204231 is a deficient number, since it is larger than the sum of its proper divisors (1).

312131330204231 is an equidigital number, since it uses as much as digits as its factorization.

312131330204231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 312131330204231 its reverse (132402033131213), we get a palindrome (444533363335444).

The spelling of 312131330204231 in words is "three hundred twelve trillion, one hundred thirty-one billion, three hundred thirty million, two hundred four thousand, two hundred thirty-one".