2321131391 has 2 divisors, whose sum is σ = 2321131392. Its totient is φ = 2321131390.

The previous prime is 2321131369. The next prime is 2321131441. The reversal of 2321131391 is 1931311232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2321131391 - 2¹⁴ = 2321115007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2321131391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2321131301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160565695 + 1160565696.

It is an arithmetic number, because the mean of its divisors is an integer number (1160565696).

Almost surely, 2^2321131391 is an apocalyptic number.

2321131391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321131391 is an equidigital number, since it uses as much as digits as its factorization.

2321131391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 26.

The square root of 2321131391 is about 48178.1214972107. The cubic root of 2321131391 is about 1324.0363499465.

The spelling of 2321131391 in words is "two billion, three hundred twenty-one million, one hundred thirty-one thousand, three hundred ninety-one".