305122513 has 2 divisors, whose sum is σ = 305122514. Its totient is φ = 305122512.

The previous prime is 305122459. The next prime is 305122523. The reversal of 305122513 is 315221503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156575169 + 148547344 = 12513^2 + 12188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305122513 is a prime.

It is not a weakly prime, because it can be changed into another prime (305122523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152561256 + 152561257.

It is an arithmetic number, because the mean of its divisors is an integer number (152561257).

Almost surely, 2^305122513 is an apocalyptic number.

It is an amenable number.

305122513 is a deficient number, since it is larger than the sum of its proper divisors (1).

305122513 is an equidigital number, since it uses as much as digits as its factorization.

305122513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 305122513 is about 17467.7563814017. The cubic root of 305122513 is about 673.2216659300.

The spelling of 305122513 in words is "three hundred five million, one hundred twenty-two thousand, five hundred thirteen".