305213033 has 2 divisors, whose sum is σ = 305213034. Its totient is φ = 305213032.

The previous prime is 305213021. The next prime is 305213047. The reversal of 305213033 is 330312503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239878144 + 65334889 = 15488^2 + 8083^2 .

It is a cyclic number.

It is not a de Polignac number, because 305213033 - 2¹⁰ = 305212009 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 305212996 and 305213014.

It is not a weakly prime, because it can be changed into another prime (305213833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152606516 + 152606517.

It is an arithmetic number, because the mean of its divisors is an integer number (152606517).

Almost surely, 2^305213033 is an apocalyptic number.

It is an amenable number.

305213033 is a deficient number, since it is larger than the sum of its proper divisors (1).

305213033 is an equidigital number, since it uses as much as digits as its factorization.

305213033 is an odious number, because the sum of its binary digits is odd.

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

The square root of 305213033 is about 17470.3472489816. The cubic root of 305213033 is about 673.2882337263.

Adding to 305213033 its reverse (330312503), we get a palindrome (635525536).

The spelling of 305213033 in words is "three hundred five million, two hundred thirteen thousand, thirty-three".