201326031391 has 2 divisors, whose sum is σ = 201326031392. Its totient is φ = 201326031390.

The previous prime is 201326031377. The next prime is 201326031437. The reversal of 201326031391 is 193130623102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201326031391 - 2¹⁷ = 201325900319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201326031091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100663015695 + 100663015696.

It is an arithmetic number, because the mean of its divisors is an integer number (100663015696).

Almost surely, 2^201326031391 is an apocalyptic number.

201326031391 is a deficient number, since it is larger than the sum of its proper divisors (1).

201326031391 is an equidigital number, since it uses as much as digits as its factorization.

201326031391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

Adding to 201326031391 its reverse (193130623102), we get a palindrome (394456654493).

The spelling of 201326031391 in words is "two hundred one billion, three hundred twenty-six million, thirty-one thousand, three hundred ninety-one".