201330432781 has 2 divisors, whose sum is σ = 201330432782. Its totient is φ = 201330432780.

The previous prime is 201330432731. The next prime is 201330432869. The reversal of 201330432781 is 187234033102.

201330432781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153135255625 + 48195177156 = 391325^2 + 219534^2 .

It is a cyclic number.

It is not a de Polignac number, because 201330432781 - 2⁹ = 201330432269 is a prime.

It is a super-2 number, since 2×201330432781² (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 (201330432701) 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, 100665216390 + 100665216391.

It is an arithmetic number, because the mean of its divisors is an integer number (100665216391).

Almost surely, 2^201330432781 is an apocalyptic number.

It is an amenable number.

201330432781 is a deficient number, since it is larger than the sum of its proper divisors (1).

201330432781 is an equidigital number, since it uses as much as digits as its factorization.

201330432781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 34.

Adding to 201330432781 its reverse (187234033102), we get a palindrome (388564465883).

The spelling of 201330432781 in words is "two hundred one billion, three hundred thirty million, four hundred thirty-two thousand, seven hundred eighty-one".