202313321381 has 2 divisors, whose sum is σ = 202313321382. Its totient is φ = 202313321380.

The previous prime is 202313321347. The next prime is 202313321389. The reversal of 202313321381 is 183123313202.

202313321381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199786650625 + 2526670756 = 446975^2 + 50266^2 .

It is a cyclic number.

It is not a de Polignac number, because 202313321381 - 2¹⁸ = 202313059237 is a prime.

It is a super-2 number, since 2×202313321381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202313321389) 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, 101156660690 + 101156660691.

It is an arithmetic number, because the mean of its divisors is an integer number (101156660691).

Almost surely, 2^202313321381 is an apocalyptic number.

It is an amenable number.

202313321381 is a deficient number, since it is larger than the sum of its proper divisors (1).

202313321381 is an equidigital number, since it uses as much as digits as its factorization.

202313321381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 202313321381 its reverse (183123313202), we get a palindrome (385436634583).

The spelling of 202313321381 in words is "two hundred two billion, three hundred thirteen million, three hundred twenty-one thousand, three hundred eighty-one".