201330491 has 2 divisors, whose sum is σ = 201330492. Its totient is φ = 201330490.

The previous prime is 201330449. The next prime is 201330497. The reversal of 201330491 is 194033102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201330491 - 2⁶ = 201330427 is a prime.

It is not a weakly prime, because it can be changed into another prime (201330497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100665245 + 100665246.

It is an arithmetic number, because the mean of its divisors is an integer number (100665246).

Almost surely, 2^201330491 is an apocalyptic number.

201330491 is a deficient number, since it is larger than the sum of its proper divisors (1).

201330491 is an equidigital number, since it uses as much as digits as its factorization.

201330491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 201330491 is about 14189.0976104895. The cubic root of 201330491 is about 586.0974756990.

Adding to 201330491 its reverse (194033102), we get a palindrome (395363593).

The spelling of 201330491 in words is "two hundred one million, three hundred thirty thousand, four hundred ninety-one".