305320133 has 2 divisors, whose sum is σ = 305320134. Its totient is φ = 305320132.

The previous prime is 305320129. The next prime is 305320151. The reversal of 305320133 is 331023503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 303003649 + 2316484 = 17407^2 + 1522^2 .

It is a cyclic number.

It is not a de Polignac number, because 305320133 - 2² = 305320129 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305320733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152660066 + 152660067.

It is an arithmetic number, because the mean of its divisors is an integer number (152660067).

Almost surely, 2^305320133 is an apocalyptic number.

It is an amenable number.

305320133 is a deficient number, since it is larger than the sum of its proper divisors (1).

305320133 is an equidigital number, since it uses as much as digits as its factorization.

305320133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 20.

The square root of 305320133 is about 17473.4121739287. The cubic root of 305320133 is about 673.3669773460.

Adding to 305320133 its reverse (331023503), we get a palindrome (636343636).

The spelling of 305320133 in words is "three hundred five million, three hundred twenty thousand, one hundred thirty-three".