305339131 has 2 divisors, whose sum is σ = 305339132. Its totient is φ = 305339130.

The previous prime is 305339129. The next prime is 305339137. The reversal of 305339131 is 131933503.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 305339131 - 2¹ = 305339129 is a prime.

It is a super-2 number, since 2×305339131² = 186463969839670322, which contains 22 as substring.

Together with 305339129, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 305339131.

It is not a weakly prime, because it can be changed into another prime (305339137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152669565 + 152669566.

It is an arithmetic number, because the mean of its divisors is an integer number (152669566).

Almost surely, 2^305339131 is an apocalyptic number.

305339131 is the 11052-nd centered pentagonal number.

305339131 is a deficient number, since it is larger than the sum of its proper divisors (1).

305339131 is an equidigital number, since it uses as much as digits as its factorization.

305339131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 28.

The square root of 305339131 is about 17473.9557914057. The cubic root of 305339131 is about 673.3809434089.

The spelling of 305339131 in words is "three hundred five million, three hundred thirty-nine thousand, one hundred thirty-one".