201330823 has 2 divisors, whose sum is σ = 201330824. Its totient is φ = 201330822.

The previous prime is 201330817. The next prime is 201330851. The reversal of 201330823 is 328033102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201330823 - 2⁵ = 201330791 is a prime.

It is equal to p_11148601 and since 201330823 and 11148601 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 201330794 and 201330803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201330863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100665411 + 100665412.

It is an arithmetic number, because the mean of its divisors is an integer number (100665412).

Almost surely, 2^201330823 is an apocalyptic number.

201330823 is a deficient number, since it is larger than the sum of its proper divisors (1).

201330823 is an equidigital number, since it uses as much as digits as its factorization.

201330823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 201330823 is about 14189.1093096078. The cubic root of 201330823 is about 586.0977978629.

Adding to 201330823 its reverse (328033102), we get a palindrome (529363925).

The spelling of 201330823 in words is "two hundred one million, three hundred thirty thousand, eight hundred twenty-three".