306342131 has 2 divisors, whose sum is σ = 306342132. Its totient is φ = 306342130.

The previous prime is 306342121. The next prime is 306342133. The reversal of 306342131 is 131243603.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-306342131 is a prime.

It is a super-2 number, since 2×306342131² = 187691002451242322, which contains 22 as substring.

Together with 306342133, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 306342097 and 306342106.

It is not a weakly prime, because it can be changed into another prime (306342133) 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, 153171065 + 153171066.

It is an arithmetic number, because the mean of its divisors is an integer number (153171066).

Almost surely, 2^306342131 is an apocalyptic number.

306342131 is a deficient number, since it is larger than the sum of its proper divisors (1).

306342131 is an equidigital number, since it uses as much as digits as its factorization.

306342131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 306342131 is about 17502.6321163418. The cubic root of 306342131 is about 674.1174609714.

Adding to 306342131 its reverse (131243603), we get a palindrome (437585734).

The spelling of 306342131 in words is "three hundred six million, three hundred forty-two thousand, one hundred thirty-one".