305133131 has 2 divisors, whose sum is σ = 305133132. Its totient is φ = 305133130.

The previous prime is 305133107. The next prime is 305133139. The reversal of 305133131 is 131331503.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 305133131 - 2⁶ = 305133067 is a prime.

It is a super-2 number, since 2×305133131² = 186212455267726322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (305133139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152566565 + 152566566.

It is an arithmetic number, because the mean of its divisors is an integer number (152566566).

Almost surely, 2^305133131 is an apocalyptic number.

305133131 is a deficient number, since it is larger than the sum of its proper divisors (1).

305133131 is an equidigital number, since it uses as much as digits as its factorization.

305133131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405, while the sum is 20.

The square root of 305133131 is about 17468.0603101775. The cubic root of 305133131 is about 673.2294750169.

Adding to 305133131 its reverse (131331503), we get a palindrome (436464634).

The spelling of 305133131 in words is "three hundred five million, one hundred thirty-three thousand, one hundred thirty-one".