202131304381 has 2 divisors, whose sum is σ = 202131304382. Its totient is φ = 202131304380.

The previous prime is 202131304373. The next prime is 202131304411. The reversal of 202131304381 is 183403131202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202019685156 + 111619225 = 449466^2 + 10565^2 .

It is a cyclic number.

It is not a de Polignac number, because 202131304381 - 2³ = 202131304373 is a prime.

It is a super-2 number, since 2×202131304381² (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 (202131304351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101065652190 + 101065652191.

It is an arithmetic number, because the mean of its divisors is an integer number (101065652191).

Almost surely, 2^202131304381 is an apocalyptic number.

It is an amenable number.

202131304381 is a deficient number, since it is larger than the sum of its proper divisors (1).

202131304381 is an equidigital number, since it uses as much as digits as its factorization.

202131304381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 202131304381 its reverse (183403131202), we get a palindrome (385534435583).

The spelling of 202131304381 in words is "two hundred two billion, one hundred thirty-one million, three hundred four thousand, three hundred eighty-one".