231310310381 has 2 divisors, whose sum is σ = 231310310382. Its totient is φ = 231310310380.

The previous prime is 231310310369. The next prime is 231310310383. The reversal of 231310310381 is 183013013132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190911320356 + 40398990025 = 436934^2 + 200995^2 .

It is a cyclic number.

It is not a de Polignac number, because 231310310381 - 2¹⁰ = 231310309357 is a prime.

It is a super-2 number, since 2×231310310381² (a number of 24 digits) contains 22 as substring.

Together with 231310310383, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231310310381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231310310383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115655155190 + 115655155191.

It is an arithmetic number, because the mean of its divisors is an integer number (115655155191).

Almost surely, 2^231310310381 is an apocalyptic number.

It is an amenable number.

231310310381 is a deficient number, since it is larger than the sum of its proper divisors (1).

231310310381 is an equidigital number, since it uses as much as digits as its factorization.

231310310381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 231310310381 in words is "two hundred thirty-one billion, three hundred ten million, three hundred ten thousand, three hundred eighty-one".